22491325 has 12 divisors (see below), whose sum is σ = 28012468. Its totient is φ = 17913600.

The previous prime is 22491317. The next prime is 22491341. The reversal of 22491325 is 52319422.

It can be written as a sum of positive squares in 6 ways, for example, as 4761 + 22486564 = 69^2 + 4742^2 .

It is not a de Polignac number, because 22491325 - 2³ = 22491317 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22491293 and 22491302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4159 + ... + 7891.

Almost surely, 2^22491325 is an apocalyptic number.

22491325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22491325 is a deficient number, since it is larger than the sum of its proper divisors (5521143).

22491325 is a wasteful number, since it uses less digits than its factorization.

22491325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984 (or 3979 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 22491325 is about 4742.5019768051. The cubic root of 22491325 is about 282.2745218335.

The spelling of 22491325 in words is "twenty-two million, four hundred ninety-one thousand, three hundred twenty-five".