22531630 has 32 divisors (see below), whose sum is σ = 46850400. Its totient is φ = 7710720.

The previous prime is 22531627. The next prime is 22531633. The reversal of 22531630 is 3613522.

It is an interprime number because it is at equal distance from previous prime (22531627) and next prime (22531633).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22531633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4155 + ... + 7894.

It is an arithmetic number, because the mean of its divisors is an integer number (1464075).

Almost surely, 2^22531630 is an apocalyptic number.

22531630 is an abundant number, since it is smaller than the sum of its proper divisors (24318770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22531630 is a wasteful number, since it uses less digits than its factorization.

22531630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12084.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 22531630 is about 4746.7494140728. The cubic root of 22531630 is about 282.4430354769.

It can be divided in two parts, 2253 and 1630, that added together give a palindrome (3883).

The spelling of 22531630 in words is "twenty-two million, five hundred thirty-one thousand, six hundred thirty".