23135681 has 2 divisors, whose sum is σ = 23135682. Its totient is φ = 23135680.

The previous prime is 23135633. The next prime is 23135687. The reversal of 23135681 is 18653132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15523600 + 7612081 = 3940^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 23135681 - 2⁶ = 23135617 is a prime.

It is a super-2 number, since 2×23135681² = 1070519470667522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23135687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11567840 + 11567841.

It is an arithmetic number, because the mean of its divisors is an integer number (11567841).

Almost surely, 2^23135681 is an apocalyptic number.

It is an amenable number.

23135681 is a deficient number, since it is larger than the sum of its proper divisors (1).

23135681 is an equidigital number, since it uses as much as digits as its factorization.

23135681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 23135681 is about 4809.9564447092. The cubic root of 23135681 is about 284.9448174683.

The spelling of 23135681 in words is "twenty-three million, one hundred thirty-five thousand, six hundred eighty-one".