22287425 has 18 divisors (see below), whose sum is σ = 29390418. Its totient is φ = 16707840.

The previous prime is 22287413. The next prime is 22287443. The reversal of 22287425 is 52478222.

It can be written as a sum of positive squares in 9 ways, for example, as 394384 + 21893041 = 628^2 + 4679^2 .

It is not a de Polignac number, because 22287425 - 2⁸ = 22287169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22287391 and 22287400.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 97211 + ... + 97439.

It is an arithmetic number, because the mean of its divisors is an integer number (1632801).

Almost surely, 2^22287425 is an apocalyptic number.

22287425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22287425 is a deficient number, since it is larger than the sum of its proper divisors (7102993).

22287425 is an equidigital number, since it uses as much as digits as its factorization.

22287425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 251 counting only the distinct ones).

The product of its digits is 17920, while the sum is 32.

The square root of 22287425 is about 4720.9559413322. The cubic root of 22287425 is about 281.4189240351.

The spelling of 22287425 in words is "twenty-two million, two hundred eighty-seven thousand, four hundred twenty-five".