23312313281 has 2 divisors, whose sum is σ = 23312313282. Its totient is φ = 23312313280.

The previous prime is 23312313253. The next prime is 23312313313. The reversal of 23312313281 is 18231321332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12513778225 + 10798535056 = 111865^2 + 103916^2 .

It is a cyclic number.

It is not a de Polignac number, because 23312313281 - 2¹⁴ = 23312296897 is a prime.

It is a super-2 number, since 2×23312313281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23312313181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11656156640 + 11656156641.

It is an arithmetic number, because the mean of its divisors is an integer number (11656156641).

Almost surely, 2^23312313281 is an apocalyptic number.

It is an amenable number.

23312313281 is a deficient number, since it is larger than the sum of its proper divisors (1).

23312313281 is an equidigital number, since it uses as much as digits as its factorization.

23312313281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The spelling of 23312313281 in words is "twenty-three billion, three hundred twelve million, three hundred thirteen thousand, two hundred eighty-one".