231977375 has 16 divisors (see below), whose sum is σ = 330867264. Its totient is φ = 159069600.

The previous prime is 231977357. The next prime is 231977381. The reversal of 231977375 is 573779132.

It is not a de Polignac number, because 231977375 - 2¹⁴ = 231960991 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131684 + ... + 133433.

It is an arithmetic number, because the mean of its divisors is an integer number (20679204).

Almost surely, 2^231977375 is an apocalyptic number.

231977375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

231977375 is a deficient number, since it is larger than the sum of its proper divisors (98889889).

231977375 is an equidigital number, since it uses as much as digits as its factorization.

231977375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265139 (or 265129 counting only the distinct ones).

The product of its digits is 277830, while the sum is 44.

The square root of 231977375 is about 15230.8034916087. The cubic root of 231977375 is about 614.4433900142.

The spelling of 231977375 in words is "two hundred thirty-one million, nine hundred seventy-seven thousand, three hundred seventy-five".