22642631 has 8 divisors (see below), whose sum is σ = 25369104. Its totient is φ = 20027520.

The previous prime is 22642561. The next prime is 22642637. The reversal of 22642631 is 13624622.

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

It is a cyclic number.

It is not a de Polignac number, because 22642631 - 2¹⁸ = 22380487 is a prime.

It is a super-2 number, since 2×22642631² = 1025377477204322, which contains 22 as substring.

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 22642631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22642637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27410 + ... + 28223.

It is an arithmetic number, because the mean of its divisors is an integer number (3171138).

Almost surely, 2^22642631 is an apocalyptic number.

22642631 is a deficient number, since it is larger than the sum of its proper divisors (2726473).

22642631 is a wasteful number, since it uses less digits than its factorization.

22642631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55681.

The product of its digits is 3456, while the sum is 26.

The square root of 22642631 is about 4758.4273662629. The cubic root of 22642631 is about 282.9060899475.

Subtracting from 22642631 its reverse (13624622), we obtain a square (9018009 = 3003²).

The spelling of 22642631 in words is "twenty-two million, six hundred forty-two thousand, six hundred thirty-one".