55086431 has 2 divisors, whose sum is σ = 55086432. Its totient is φ = 55086430.

The previous prime is 55086419. The next prime is 55086517. The reversal of 55086431 is 13468055.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55086431 is a prime.

It is a super-2 number, since 2×55086431² = 6069029760635522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55086401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27543215 + 27543216.

It is an arithmetic number, because the mean of its divisors is an integer number (27543216).

Almost surely, 2^55086431 is an apocalyptic number.

55086431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55086431 is an equidigital number, since it uses as much as digits as its factorization.

55086431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 55086431 is about 7422.0233764116. The cubic root of 55086431 is about 380.4943496864.

The spelling of 55086431 in words is "fifty-five million, eighty-six thousand, four hundred thirty-one".