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208115221825316 = 221361317206971909
BaseRepresentation
bin101111010100011110011001…
…110111101000011100100100
31000021212121202122012122111102
4233110132121313220130210
5204234224433241402231
62014342451341055232
761556554130560031
oct5724363167503444
91007777678178442
10208115221825316
1160348196193303
121b41215a857518
138c18248167cb0
143956b8abac388
15190d84b76eacb
hexbd4799de8724

208115221825316 has 48 divisors (see below), whose sum is σ = 399904501400880. Its totient is φ = 94180497016320.

The previous prime is 208115221825283. The next prime is 208115221825339. The reversal of 208115221825316 is 613528122511802.

It can be written as a sum of positive squares in 8 ways, for example, as 33422273440000 + 174692948385316 = 5781200^2 + 13217146^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102480431 + ... + 104491478.

It is an arithmetic number, because the mean of its divisors is an integer number (8331343779185).

Almost surely, 2208115221825316 is an apocalyptic number.

208115221825316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

208115221825316 is a deficient number, since it is larger than the sum of its proper divisors (191789279575564).

208115221825316 is a wasteful number, since it uses less digits than its factorization.

208115221825316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206972304 (or 206972302 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 47.

The spelling of 208115221825316 in words is "two hundred eight trillion, one hundred fifteen billion, two hundred twenty-one million, eight hundred twenty-five thousand, three hundred sixteen".

Divisors: 1 2 4 13 26 52 61 122 244 317 634 793 1268 1586 3172 4121 8242 16484 19337 38674 77348 251381 502762 1005524 206971909 413943818 827887636 2690634817 5381269634 10762539268 12625286449 25250572898 50501145796 65610095153 131220190306 164128723837 262440380612 328257447674 656514895348 852931236989 1705862473978 3411724947956 4002215804333 8004431608666 16008863217332 52028805456329 104057610912658 208115221825316