55688071931 has 2 divisors, whose sum is σ = 55688071932. Its totient is φ = 55688071930.

The previous prime is 55688071903. The next prime is 55688071939. The reversal of 55688071931 is 13917088655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55688071931 is a prime.

It is a super-2 number, since 2×55688071931² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55688071939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27844035965 + 27844035966.

It is an arithmetic number, because the mean of its divisors is an integer number (27844035966).

Almost surely, 2^55688071931 is an apocalyptic number.

55688071931 is a deficient number, since it is larger than the sum of its proper divisors (1).

55688071931 is an equidigital number, since it uses as much as digits as its factorization.

55688071931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 55688071931 in words is "fifty-five billion, six hundred eighty-eight million, seventy-one thousand, nine hundred thirty-one".