16137431 has 2 divisors, whose sum is σ = 16137432. Its totient is φ = 16137430.

The previous prime is 16137413. The next prime is 16137461. The reversal of 16137431 is 13473161.

Together with previous prime (16137413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16137431 is a prime.

It is a super-2 number, since 2×16137431² = 520833358559522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16137431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16137461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8068715 + 8068716.

It is an arithmetic number, because the mean of its divisors is an integer number (8068716).

Almost surely, 2^16137431 is an apocalyptic number.

16137431 is a deficient number, since it is larger than the sum of its proper divisors (1).

16137431 is an equidigital number, since it uses as much as digits as its factorization.

16137431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 16137431 is about 4017.1421433651. The cubic root of 16137431 is about 252.7036216541.

The spelling of 16137431 in words is "sixteen million, one hundred thirty-seven thousand, four hundred thirty-one".