55560931 has 2 divisors, whose sum is σ = 55560932. Its totient is φ = 55560930.

The previous prime is 55560917. The next prime is 55560971. The reversal of 55560931 is 13906555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55560931 - 2⁹ = 55560419 is a prime.

It is a super-2 number, since 2×55560931² = 6174034107173522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55560971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27780465 + 27780466.

It is an arithmetic number, because the mean of its divisors is an integer number (27780466).

Almost surely, 2^55560931 is an apocalyptic number.

55560931 is a deficient number, since it is larger than the sum of its proper divisors (1).

55560931 is an equidigital number, since it uses as much as digits as its factorization.

55560931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 55560931 is about 7453.9205120527. The cubic root of 55560931 is about 381.5837204832.

The spelling of 55560931 in words is "fifty-five million, five hundred sixty thousand, nine hundred thirty-one".