22631881 has 4 divisors (see below), whose sum is σ = 22851712. Its totient is φ = 22412052.

The previous prime is 22631867. The next prime is 22631887. The reversal of 22631881 is 18813622.

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 22631881 - 2⁵ = 22631849 is a prime.

It is a super-2 number, since 2×22631881² = 1024404075196322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22631887) 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, 109761 + ... + 109966.

It is an arithmetic number, because the mean of its divisors is an integer number (5712928).

Almost surely, 2^22631881 is an apocalyptic number.

It is an amenable number.

22631881 is a deficient number, since it is larger than the sum of its proper divisors (219831).

22631881 is a wasteful number, since it uses less digits than its factorization.

22631881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219830.

The product of its digits is 4608, while the sum is 31.

The square root of 22631881 is about 4757.2976572840. The cubic root of 22631881 is about 282.8613112601.

The spelling of 22631881 in words is "twenty-two million, six hundred thirty-one thousand, eight hundred eighty-one".