231907061 has 2 divisors, whose sum is σ = 231907062. Its totient is φ = 231907060.

The previous prime is 231906973. The next prime is 231907069. The reversal of 231907061 is 160709132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149206225 + 82700836 = 12215^2 + 9094^2 .

It is a cyclic number.

It is not a de Polignac number, because 231907061 - 2²² = 227712757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231907069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115953530 + 115953531.

It is an arithmetic number, because the mean of its divisors is an integer number (115953531).

Almost surely, 2^231907061 is an apocalyptic number.

It is an amenable number.

231907061 is a deficient number, since it is larger than the sum of its proper divisors (1).

231907061 is an equidigital number, since it uses as much as digits as its factorization.

231907061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 231907061 is about 15228.4950339815. The cubic root of 231907061 is about 614.3813030134.

The spelling of 231907061 in words is "two hundred thirty-one million, nine hundred seven thousand, sixty-one".