23557081 has 2 divisors, whose sum is σ = 23557082. Its totient is φ = 23557080.

The previous prime is 23557067. The next prime is 23557099. The reversal of 23557081 is 18075532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21013056 + 2544025 = 4584^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 23557081 - 2⁹ = 23556569 is a prime.

It is a super-2 number, since 2×23557081² = 1109872130481122, which contains 22 as substring.

It is equal to p_1481089 and since 23557081 and 1481089 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23557381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11778540 + 11778541.

It is an arithmetic number, because the mean of its divisors is an integer number (11778541).

Almost surely, 2^23557081 is an apocalyptic number.

It is an amenable number.

23557081 is a deficient number, since it is larger than the sum of its proper divisors (1).

23557081 is an equidigital number, since it uses as much as digits as its factorization.

23557081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 23557081 is about 4853.5637422414. The cubic root of 23557081 is about 286.6644412723.

The spelling of 23557081 in words is "twenty-three million, five hundred fifty-seven thousand, eighty-one".