22231631 has 8 divisors (see below), whose sum is σ = 23627664. Its totient is φ = 20845440.

The previous prime is 22231609. The next prime is 22231637. The reversal of 22231631 is 13613222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22231631 is a prime.

It is a super-2 number, since 2×22231631² = 988490833840322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2501 + ... + 7121.

It is an arithmetic number, because the mean of its divisors is an integer number (2953458).

Almost surely, 2^22231631 is an apocalyptic number.

22231631 is a deficient number, since it is larger than the sum of its proper divisors (1396033).

22231631 is a wasteful number, since it uses less digits than its factorization.

22231631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4921.

The product of its digits is 432, while the sum is 20.

The square root of 22231631 is about 4715.0430538861. The cubic root of 22231631 is about 281.1838945213.

Adding to 22231631 its reverse (13613222), we get a palindrome (35844853).

The spelling of 22231631 in words is "twenty-two million, two hundred thirty-one thousand, six hundred thirty-one".