23551501 has 2 divisors, whose sum is σ = 23551502. Its totient is φ = 23551500.

The previous prime is 23551459. The next prime is 23551529. The reversal of 23551501 is 10515532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12595401 + 10956100 = 3549^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 23551501 - 2¹¹ = 23549453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23551531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11775750 + 11775751.

It is an arithmetic number, because the mean of its divisors is an integer number (11775751).

Almost surely, 2^23551501 is an apocalyptic number.

It is an amenable number.

23551501 is a deficient number, since it is larger than the sum of its proper divisors (1).

23551501 is an equidigital number, since it uses as much as digits as its factorization.

23551501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 23551501 is about 4852.9888728494. The cubic root of 23551501 is about 286.6418052774.

The spelling of 23551501 in words is "twenty-three million, five hundred fifty-one thousand, five hundred one".