22531968 has 48 divisors (see below), whose sum is σ = 64841400. Its totient is φ = 7510272.

The previous prime is 22531963. The next prime is 22531969. The reversal of 22531968 is 86913522.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22531963) 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 5 ways as a sum of consecutive naturals, for example, 8628 + ... + 10931.

Almost surely, 2^22531968 is an apocalyptic number.

It is an amenable number.

22531968 is an abundant number, since it is smaller than the sum of its proper divisors (42309432).

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

22531968 is a wasteful number, since it uses less digits than its factorization.

22531968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19579 (or 19564 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 22531968 is about 4746.7850172511. The cubic root of 22531968 is about 282.4444477918. Note that the first 5 decimals are identical.

The spelling of 22531968 in words is "twenty-two million, five hundred thirty-one thousand, nine hundred sixty-eight".