231512801257 has 2 divisors, whose sum is σ = 231512801258. Its totient is φ = 231512801256.

The previous prime is 231512801251. The next prime is 231512801281. The reversal of 231512801257 is 752108215132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185034184336 + 46478616921 = 430156^2 + 215589^2 .

It is a cyclic number.

It is not a de Polignac number, because 231512801257 - 2¹¹ = 231512799209 is a prime.

It is not a weakly prime, because it can be changed into another prime (231512801251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115756400628 + 115756400629.

It is an arithmetic number, because the mean of its divisors is an integer number (115756400629).

Almost surely, 2^231512801257 is an apocalyptic number.

It is an amenable number.

231512801257 is a deficient number, since it is larger than the sum of its proper divisors (1).

231512801257 is an equidigital number, since it uses as much as digits as its factorization.

231512801257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 231512801257 in words is "two hundred thirty-one billion, five hundred twelve million, eight hundred one thousand, two hundred fifty-seven".