231045961 has 2 divisors, whose sum is σ = 231045962. Its totient is φ = 231045960.

The previous prime is 231045953. The next prime is 231045973. The reversal of 231045961 is 169540132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225570361 + 5475600 = 15019^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 231045961 - 2³ = 231045953 is a prime.

It is not a weakly prime, because it can be changed into another prime (231045911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115522980 + 115522981.

It is an arithmetic number, because the mean of its divisors is an integer number (115522981).

Almost surely, 2^231045961 is an apocalyptic number.

It is an amenable number.

231045961 is a deficient number, since it is larger than the sum of its proper divisors (1).

231045961 is an equidigital number, since it uses as much as digits as its factorization.

231045961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 231045961 is about 15200.1960842615. The cubic root of 231045961 is about 613.6199349410.

The spelling of 231045961 in words is "two hundred thirty-one million, forty-five thousand, nine hundred sixty-one".