231475121 has 2 divisors, whose sum is σ = 231475122. Its totient is φ = 231475120.

The previous prime is 231475073. The next prime is 231475163. The reversal of 231475121 is 121574132.

231475121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212430625 + 19044496 = 14575^2 + 4364^2 .

It is a cyclic number.

It is not a de Polignac number, because 231475121 - 2¹⁰ = 231474097 is a prime.

It is not a weakly prime, because it can be changed into another prime (231475721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115737560 + 115737561.

It is an arithmetic number, because the mean of its divisors is an integer number (115737561).

Almost surely, 2^231475121 is an apocalyptic number.

It is an amenable number.

231475121 is a deficient number, since it is larger than the sum of its proper divisors (1).

231475121 is an equidigital number, since it uses as much as digits as its factorization.

231475121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 231475121 is about 15214.3064580677. The cubic root of 231475121 is about 613.9996259905. Note that the first 3 decimals are identical.

The spelling of 231475121 in words is "two hundred thirty-one million, four hundred seventy-five thousand, one hundred twenty-one".