15970231 has 4 divisors (see below), whose sum is σ = 16040200. Its totient is φ = 15900264.

The previous prime is 15970217. The next prime is 15970247. The reversal of 15970231 is 13207951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15970231 - 2⁷ = 15970103 is a prime.

It is a super-2 number, since 2×15970231² = 510096556386722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15970231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15970291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34641 + ... + 35098.

It is an arithmetic number, because the mean of its divisors is an integer number (4010050).

Almost surely, 2^15970231 is an apocalyptic number.

15970231 is a deficient number, since it is larger than the sum of its proper divisors (69969).

15970231 is an equidigital number, since it uses as much as digits as its factorization.

15970231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69968.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 15970231 is about 3996.2771425415. The cubic root of 15970231 is about 251.8278355001.

The spelling of 15970231 in words is "fifteen million, nine hundred seventy thousand, two hundred thirty-one".