23131023281 has 2 divisors, whose sum is σ = 23131023282. Its totient is φ = 23131023280.

The previous prime is 23131023269. The next prime is 23131023319. The reversal of 23131023281 is 18232013132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23038382656 + 92640625 = 151784^2 + 9625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131023281 is a prime.

It is a super-2 number, since 2×23131023281² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23131023281.

It is not a weakly prime, because it can be changed into another prime (23131023211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565511640 + 11565511641.

It is an arithmetic number, because the mean of its divisors is an integer number (11565511641).

Almost surely, 2^23131023281 is an apocalyptic number.

It is an amenable number.

23131023281 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131023281 is an equidigital number, since it uses as much as digits as its factorization.

23131023281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 23131023281 in words is "twenty-three billion, one hundred thirty-one million, twenty-three thousand, two hundred eighty-one".