23312881 has 2 divisors, whose sum is σ = 23312882. Its totient is φ = 23312880.

The previous prime is 23312857. The next prime is 23312909. The reversal of 23312881 is 18821332.

It is an a-pointer prime, because the next prime (23312909) can be obtained adding 23312881 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23193856 + 119025 = 4816^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 23312881 - 2¹³ = 23304689 is a prime.

It is a super-2 number, since 2×23312881² = 1086980841040322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23312281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11656440 + 11656441.

It is an arithmetic number, because the mean of its divisors is an integer number (11656441).

Almost surely, 2^23312881 is an apocalyptic number.

It is an amenable number.

23312881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23312881 is an equidigital number, since it uses as much as digits as its factorization.

23312881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 23312881 is about 4828.3414336602. The cubic root of 23312881 is about 285.6704478337.

The spelling of 23312881 in words is "twenty-three million, three hundred twelve thousand, eight hundred eighty-one".