231389375 has 20 divisors (see below), whose sum is σ = 330456720. Its totient is φ = 158664000.

The previous prime is 231389359. The next prime is 231389381. The reversal of 231389375 is 573983132.

It is not a de Polignac number, because 231389375 - 2⁴ = 231389359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22070 + ... + 30819.

It is an arithmetic number, because the mean of its divisors is an integer number (16522836).

Almost surely, 2^231389375 is an apocalyptic number.

231389375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

231389375 is a deficient number, since it is larger than the sum of its proper divisors (99067345).

231389375 is an frugal number, since it uses more digits than its factorization.

231389375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52916 (or 52901 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 231389375 is about 15211.4882572351. The cubic root of 231389375 is about 613.9238014067.

The spelling of 231389375 in words is "two hundred thirty-one million, three hundred eighty-nine thousand, three hundred seventy-five".