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2166221655241 = 72312833503383
BaseRepresentation
bin11111100001011100110…
…111110100110011001001
321200002101201012211110121
4133201130313310303021
5240442410220431431
64335052023543241
7312334664155600
oct37413467646311
97602351184417
102166221655241
11765764718686
122ab9b32bab21
131293737969a7
1476bba7d0a37
153b535c88611
hex1f85cdf4cc9

2166221655241 has 24 divisors (see below), whose sum is σ = 2602100626944. Its totient is φ = 1796228058240.

The previous prime is 2166221655211. The next prime is 2166221655337. The reversal of 2166221655241 is 1425561226612.

It is a happy number.

It is not a de Polignac number, because 2166221655241 - 225 = 2166188100809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166221655211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4051636 + ... + 4555018.

It is an arithmetic number, because the mean of its divisors is an integer number (108420859456).

Almost surely, 22166221655241 is an apocalyptic number.

It is an amenable number.

2166221655241 is a deficient number, since it is larger than the sum of its proper divisors (435878971703).

2166221655241 is a wasteful number, since it uses less digits than its factorization.

2166221655241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506261 (or 506254 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The spelling of 2166221655241 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-five thousand, two hundred forty-one".

Divisors: 1 7 31 49 217 1519 2833 19831 87823 138817 503383 614761 3523681 4303327 15604873 24665767 109234111 764638777 1426084039 9982588273 44208605209 69878117911 309460236463 2166221655241