23572621 has 4 divisors (see below), whose sum is σ = 24385500. Its totient is φ = 22759744.

The previous prime is 23572609. The next prime is 23572687. The reversal of 23572621 is 12627532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13875625 + 9696996 = 3725^2 + 3114^2 .

It is a cyclic number.

It is not a de Polignac number, because 23572621 - 2¹⁵ = 23539853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23572621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23572691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406396 + ... + 406453.

It is an arithmetic number, because the mean of its divisors is an integer number (6096375).

Almost surely, 2^23572621 is an apocalyptic number.

It is an amenable number.

23572621 is a deficient number, since it is larger than the sum of its proper divisors (812879).

23572621 is an equidigital number, since it uses as much as digits as its factorization.

23572621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812878.

The product of its digits is 5040, while the sum is 28.

The square root of 23572621 is about 4855.1643638501. The cubic root of 23572621 is about 286.7274624677.

The spelling of 23572621 in words is "twenty-three million, five hundred seventy-two thousand, six hundred twenty-one".