55807521233 has 16 divisors (see below), whose sum is σ = 57804031296. Its totient is φ = 53845693440.

The previous prime is 55807521199. The next prime is 55807521257. The reversal of 55807521233 is 33212570855.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55807521233 is a prime.

It is a super-2 number, since 2×55807521233² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55807521433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1606973 + ... + 1641333.

It is an arithmetic number, because the mean of its divisors is an integer number (3612751956).

Almost surely, 2^55807521233 is an apocalyptic number.

It is an amenable number.

55807521233 is a deficient number, since it is larger than the sum of its proper divisors (1996510063).

55807521233 is a wasteful number, since it uses less digits than its factorization.

55807521233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34864.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 55807521233 in words is "fifty-five billion, eight hundred seven million, five hundred twenty-one thousand, two hundred thirty-three".