231645461 has 2 divisors, whose sum is σ = 231645462. Its totient is φ = 231645460.

The previous prime is 231645439. The next prime is 231645481. The reversal of 231645461 is 164546132.

231645461 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., 225300100 + 6345361 = 15010^2 + 2519^2 .

It is a cyclic number.

It is not a de Polignac number, because 231645461 - 2²⁶ = 164536597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231645431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115822730 + 115822731.

It is an arithmetic number, because the mean of its divisors is an integer number (115822731).

Almost surely, 2^231645461 is an apocalyptic number.

It is an amenable number.

231645461 is a deficient number, since it is larger than the sum of its proper divisors (1).

231645461 is an equidigital number, since it uses as much as digits as its factorization.

231645461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 231645461 is about 15219.9034491024. The cubic root of 231645461 is about 614.1502009221.

The spelling of 231645461 in words is "two hundred thirty-one million, six hundred forty-five thousand, four hundred sixty-one".