231475967 has 4 divisors (see below), whose sum is σ = 232096920. Its totient is φ = 230855016.

The previous prime is 231475957. The next prime is 231475969. The reversal of 231475967 is 769574132.

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 231475967 - 2¹⁸ = 231213823 is a prime.

It is a super-2 number, since 2×231475967² = 107162246597170178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231475969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309917 + ... + 310662.

It is an arithmetic number, because the mean of its divisors is an integer number (58024230).

Almost surely, 2^231475967 is an apocalyptic number.

231475967 is a deficient number, since it is larger than the sum of its proper divisors (620953).

231475967 is an equidigital number, since it uses as much as digits as its factorization.

231475967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620952.

The product of its digits is 317520, while the sum is 44.

The square root of 231475967 is about 15214.3342608213. The cubic root of 231475967 is about 614.0003740090. Note that the first 3 decimals are identical.

The spelling of 231475967 in words is "two hundred thirty-one million, four hundred seventy-five thousand, nine hundred sixty-seven".