23655621 has 12 divisors (see below), whose sum is σ = 34669376. Its totient is φ = 14336520.

The previous prime is 23655613. The next prime is 23655629. The reversal of 23655621 is 12655632.

It is an interprime number because it is at equal distance from previous prime (23655613) and next prime (23655629).

It is not a de Polignac number, because 23655621 - 2³ = 23655613 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23655629) 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 11 ways as a sum of consecutive naturals, for example, 32221 + ... + 32946.

Almost surely, 2^23655621 is an apocalyptic number.

It is an amenable number.

23655621 is a deficient number, since it is larger than the sum of its proper divisors (11013755).

23655621 is a wasteful number, since it uses less digits than its factorization.

23655621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65192 (or 65181 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 23655621 is about 4863.7044523696. The cubic root of 23655621 is about 287.0635939803.

The spelling of 23655621 in words is "twenty-three million, six hundred fifty-five thousand, six hundred twenty-one".