22291625 has 8 divisors (see below), whose sum is σ = 27820104. Its totient is φ = 17833200.

The previous prime is 22291613. The next prime is 22291639. The reversal of 22291625 is 52619222.

It can be written as a sum of positive squares in 4 ways, for example, as 2050624 + 20241001 = 1432^2 + 4499^2 .

It is not a de Polignac number, because 22291625 - 2¹⁰ = 22290601 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 89042 + ... + 89291.

It is an arithmetic number, because the mean of its divisors is an integer number (3477513).

Almost surely, 2^22291625 is an apocalyptic number.

22291625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22291625 is a deficient number, since it is larger than the sum of its proper divisors (5528479).

22291625 is an equidigital number, since it uses as much as digits as its factorization.

22291625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178348 (or 178338 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 22291625 is about 4721.4007455415. The cubic root of 22291625 is about 281.4366004490.

The spelling of 22291625 in words is "twenty-two million, two hundred ninety-one thousand, six hundred twenty-five".