55664831 has 2 divisors, whose sum is σ = 55664832. Its totient is φ = 55664830.

The previous prime is 55664827. The next prime is 55664897. The reversal of 55664831 is 13846655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55664831 - 2² = 55664827 is a prime.

It is a super-2 number, since 2×55664831² = 6197146820517122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55664801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27832415 + 27832416.

It is an arithmetic number, because the mean of its divisors is an integer number (27832416).

Almost surely, 2^55664831 is an apocalyptic number.

55664831 is a deficient number, since it is larger than the sum of its proper divisors (1).

55664831 is an equidigital number, since it uses as much as digits as its factorization.

55664831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The square root of 55664831 is about 7460.8867435446. The cubic root of 55664831 is about 381.8214286486.

The spelling of 55664831 in words is "fifty-five million, six hundred sixty-four thousand, eight hundred thirty-one".