16831231 has 2 divisors, whose sum is σ = 16831232. Its totient is φ = 16831230.

The previous prime is 16831219. The next prime is 16831247. The reversal of 16831231 is 13213861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16831231 - 2⁹ = 16830719 is a prime.

It is a super-2 number, since 2×16831231² = 566580673950722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16831196 and 16831205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16831201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8415615 + 8415616.

It is an arithmetic number, because the mean of its divisors is an integer number (8415616).

Almost surely, 2^16831231 is an apocalyptic number.

16831231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16831231 is an equidigital number, since it uses as much as digits as its factorization.

16831231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 16831231 is about 4102.5883293355. The cubic root of 16831231 is about 256.2744401833.

The spelling of 16831231 in words is "sixteen million, eight hundred thirty-one thousand, two hundred thirty-one".