231375305 has 12 divisors (see below), whose sum is σ = 322981380. Its totient is φ = 158657184.

The previous prime is 231375283. The next prime is 231375317. The reversal of 231375305 is 503573132.

It can be written as a sum of positive squares in 2 ways, for example, as 83704201 + 147671104 = 9149^2 + 12152^2 .

It is not a de Polignac number, because 231375305 - 2²² = 227181001 is a prime.

It is a Curzon number.

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471950 + ... + 472439.

It is an arithmetic number, because the mean of its divisors is an integer number (26915115).

Almost surely, 2^231375305 is an apocalyptic number.

It is an amenable number.

231375305 is a deficient number, since it is larger than the sum of its proper divisors (91606075).

231375305 is an equidigital number, since it uses as much as digits as its factorization.

231375305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944408 (or 944401 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 29.

The square root of 231375305 is about 15211.0257708019. The cubic root of 231375305 is about 613.9113576158.

The spelling of 231375305 in words is "two hundred thirty-one million, three hundred seventy-five thousand, three hundred five".