16955431 has 2 divisors, whose sum is σ = 16955432. Its totient is φ = 16955430.

The previous prime is 16955413. The next prime is 16955437. The reversal of 16955431 is 13455961.

Together with previous prime (16955413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16955431 - 2⁵ = 16955399 is a prime.

It is a super-2 number, since 2×16955431² = 574973280791522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16955437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8477715 + 8477716.

It is an arithmetic number, because the mean of its divisors is an integer number (8477716).

Almost surely, 2^16955431 is an apocalyptic number.

16955431 is a deficient number, since it is larger than the sum of its proper divisors (1).

16955431 is an equidigital number, since it uses as much as digits as its factorization.

16955431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 34.

The square root of 16955431 is about 4117.6972933911. The cubic root of 16955431 is about 256.9032576070.

The spelling of 16955431 in words is "sixteen million, nine hundred fifty-five thousand, four hundred thirty-one".