23622981 has 4 divisors (see below), whose sum is σ = 31497312. Its totient is φ = 15748652.

The previous prime is 23622971. The next prime is 23622997. The reversal of 23622981 is 18922632.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23622981 - 2¹⁰ = 23621957 is a prime.

It is a super-2 number, since 2×23622981² = 1116090462652722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23622931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3937161 + ... + 3937166.

It is an arithmetic number, because the mean of its divisors is an integer number (7874328).

Almost surely, 2^23622981 is an apocalyptic number.

It is an amenable number.

23622981 is a deficient number, since it is larger than the sum of its proper divisors (7874331).

23622981 is an equidigital number, since it uses as much as digits as its factorization.

23622981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7874330.

The product of its digits is 10368, while the sum is 33.

The square root of 23622981 is about 4860.3478270593. The cubic root of 23622981 is about 286.9315031977.

The spelling of 23622981 in words is "twenty-three million, six hundred twenty-two thousand, nine hundred eighty-one".