231132961 has 2 divisors, whose sum is σ = 231132962. Its totient is φ = 231132960.

The previous prime is 231132943. The next prime is 231132977. The reversal of 231132961 is 169231132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195132961 + 36000000 = 13969^2 + 6000^2 .

It is a cyclic number.

It is not a de Polignac number, because 231132961 - 2⁹ = 231132449 is a prime.

It is not a weakly prime, because it can be changed into another prime (231130961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115566480 + 115566481.

It is an arithmetic number, because the mean of its divisors is an integer number (115566481).

Almost surely, 2^231132961 is an apocalyptic number.

It is an amenable number.

231132961 is a deficient number, since it is larger than the sum of its proper divisors (1).

231132961 is an equidigital number, since it uses as much as digits as its factorization.

231132961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 231132961 is about 15203.0576200973. The cubic root of 231132961 is about 613.6969444890.

The spelling of 231132961 in words is "two hundred thirty-one million, one hundred thirty-two thousand, nine hundred sixty-one".