16257431 has 2 divisors, whose sum is σ = 16257432. Its totient is φ = 16257430.

The previous prime is 16257419. The next prime is 16257433. The reversal of 16257431 is 13475261.

16257431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16257431 - 2²² = 12063127 is a prime.

It is a super-2 number, since 2×16257431² = 528608125439522, which contains 22 as substring.

Together with 16257433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16257394 and 16257403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16257433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8128715 + 8128716.

It is an arithmetic number, because the mean of its divisors is an integer number (8128716).

Almost surely, 2^16257431 is an apocalyptic number.

16257431 is a deficient number, since it is larger than the sum of its proper divisors (1).

16257431 is an equidigital number, since it uses as much as digits as its factorization.

16257431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 16257431 is about 4032.0504709143. The cubic root of 16257431 is about 253.3284542381.

The spelling of 16257431 in words is "sixteen million, two hundred fifty-seven thousand, four hundred thirty-one".