22401250 has 20 divisors (see below), whose sum is σ = 41991246. Its totient is φ = 8960000.

The previous prime is 22401229. The next prime is 22401259. The reversal of 22401250 is 5210422.

It can be written as a sum of positive squares in 5 ways, for example, as 1121481 + 21279769 = 1059^2 + 4613^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22401259) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7711 + ... + 10210.

Almost surely, 2^22401250 is an apocalyptic number.

22401250 is a deficient number, since it is larger than the sum of its proper divisors (19589996).

22401250 is an equidigital number, since it uses as much as digits as its factorization.

22401250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17943 (or 17928 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 22401250 is about 4732.9958799898. The cubic root of 22401250 is about 281.8971927109.

Adding to 22401250 its reverse (5210422), we get a palindrome (27611672).

The spelling of 22401250 in words is "twenty-two million, four hundred one thousand, two hundred fifty".