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31450544240 = 2451073674129
BaseRepresentation
bin11101010010100110…
…010011100001110000
310000011211202011222212
4131102212103201300
51003402314403430
622240450151252
72162242133543
oct352246234160
9100154664885
1031450544240
111237a015425
126118882528
132c72a5c8bb
141744d5685a
15c41154b95
hex752993870

31450544240 has 40 divisors (see below), whose sum is σ = 73805923440. Its totient is φ = 12462642176.

The previous prime is 31450544201. The next prime is 31450544291. The reversal of 31450544240 is 4244505413.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 31450544197 and 31450544206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1828505 + ... + 1845624.

It is an arithmetic number, because the mean of its divisors is an integer number (1845148086).

Almost surely, 231450544240 is an apocalyptic number.

It is an amenable number.

31450544240 is an abundant number, since it is smaller than the sum of its proper divisors (42355379200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31450544240 is a wasteful number, since it uses less digits than its factorization.

31450544240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674249 (or 3674243 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The spelling of 31450544240 in words is "thirty-one billion, four hundred fifty million, five hundred forty-four thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 16 20 40 80 107 214 428 535 856 1070 1712 2140 4280 8560 3674129 7348258 14696516 18370645 29393032 36741290 58786064 73482580 146965160 293930320 393131803 786263606 1572527212 1965659015 3145054424 3931318030 6290108848 7862636060 15725272120 31450544240