22921000 has 32 divisors (see below), whose sum is σ = 53637480. Its totient is φ = 9168000.

The previous prime is 22920983. The next prime is 22921013. The reversal of 22921000 is 12922.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6421156 + 16499844 = 2534^2 + 4062^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10461 + ... + 12460.

Almost surely, 2^22921000 is an apocalyptic number.

22921000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22921000 is an abundant number, since it is smaller than the sum of its proper divisors (30716480).

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

22921000 is a wasteful number, since it uses less digits than its factorization.

22921000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22942 (or 22928 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 22921000 is about 4787.5881192935. The cubic root of 22921000 is about 284.0607223198.

Adding to 22921000 its reverse (12922), we get a palindrome (22933922).

The spelling of 22921000 in words is "twenty-two million, nine hundred twenty-one thousand".