231069331 has 2 divisors, whose sum is σ = 231069332. Its totient is φ = 231069330.

The previous prime is 231069323. The next prime is 231069341. The reversal of 231069331 is 133960132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231069331 - 2³ = 231069323 is a prime.

It is a super-2 number, since 2×231069331² = 106786071457575122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231069331.

It is not a weakly prime, because it can be changed into another prime (231069301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115534665 + 115534666.

It is an arithmetic number, because the mean of its divisors is an integer number (115534666).

Almost surely, 2^231069331 is an apocalyptic number.

231069331 is a deficient number, since it is larger than the sum of its proper divisors (1).

231069331 is an equidigital number, since it uses as much as digits as its factorization.

231069331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 231069331 is about 15200.9648049063. The cubic root of 231069331 is about 613.6406231976.

The spelling of 231069331 in words is "two hundred thirty-one million, sixty-nine thousand, three hundred thirty-one".