23153681 has 2 divisors, whose sum is σ = 23153682. Its totient is φ = 23153680.

The previous prime is 23153653. The next prime is 23153693. The reversal of 23153681 is 18635132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17297281 + 5856400 = 4159^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 23153681 - 2¹⁴ = 23137297 is a prime.

It is a super-2 number, since 2×23153681² = 1072185887699522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23153981) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11576840 + 11576841.

It is an arithmetic number, because the mean of its divisors is an integer number (11576841).

Almost surely, 2^23153681 is an apocalyptic number.

It is an amenable number.

23153681 is a deficient number, since it is larger than the sum of its proper divisors (1).

23153681 is an equidigital number, since it uses as much as digits as its factorization.

23153681 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 23153681 is about 4811.8271997236. The cubic root of 23153681 is about 285.0186958085.

The spelling of 23153681 in words is "twenty-three million, one hundred fifty-three thousand, six hundred eighty-one".