23320331257 has 2 divisors, whose sum is σ = 23320331258. Its totient is φ = 23320331256.

The previous prime is 23320331191. The next prime is 23320331261. The reversal of 23320331257 is 75213302332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18789829776 + 4530501481 = 137076^2 + 67309^2 .

It is a cyclic number.

It is not a de Polignac number, because 23320331257 - 2¹¹ = 23320329209 is a prime.

It is a super-2 number, since 2×23320331257² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23320331297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11660165628 + 11660165629.

It is an arithmetic number, because the mean of its divisors is an integer number (11660165629).

Almost surely, 2^23320331257 is an apocalyptic number.

It is an amenable number.

23320331257 is a deficient number, since it is larger than the sum of its proper divisors (1).

23320331257 is an equidigital number, since it uses as much as digits as its factorization.

23320331257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 31.

Adding to 23320331257 its reverse (75213302332), we get a palindrome (98533633589).

The spelling of 23320331257 in words is "twenty-three billion, three hundred twenty million, three hundred thirty-one thousand, two hundred fifty-seven".