23131013213257 has 2 divisors, whose sum is σ = 23131013213258. Its totient is φ = 23131013213256.

The previous prime is 23131013213233. The next prime is 23131013213317. The reversal of 23131013213257 is 75231231013132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22476550011136 + 654463202121 = 4740944^2 + 808989^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131013213257 - 2¹⁹ = 23131012688969 is a prime.

It is not a weakly prime, because it can be changed into another prime (23131013213857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565506606628 + 11565506606629.

It is an arithmetic number, because the mean of its divisors is an integer number (11565506606629).

Almost surely, 2^{23131013213257} is an apocalyptic number.

It is an amenable number.

23131013213257 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131013213257 is an equidigital number, since it uses as much as digits as its factorization.

23131013213257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

Adding to 23131013213257 its reverse (75231231013132), we get a palindrome (98362244226389).

The spelling of 23131013213257 in words is "twenty-three trillion, one hundred thirty-one billion, thirteen million, two hundred thirteen thousand, two hundred fifty-seven".