25215572 has 12 divisors (see below), whose sum is σ = 44176020. Its totient is φ = 12593856.

The previous prime is 25215563. The next prime is 25215577. The reversal of 25215572 is 27551252.

It can be written as a sum of positive squares in 2 ways, for example, as 18267076 + 6948496 = 4274^2 + 2636^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25215577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328 + ... + 7224.

It is an arithmetic number, because the mean of its divisors is an integer number (3681335).

Almost surely, 2^25215572 is an apocalyptic number.

It is an amenable number.

25215572 is a deficient number, since it is larger than the sum of its proper divisors (18960448).

25215572 is a wasteful number, since it uses less digits than its factorization.

25215572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6970 (or 6968 counting only the distinct ones).

The product of its digits is 7000, while the sum is 29.

The square root of 25215572 is about 5021.5109279977. The cubic root of 25215572 is about 293.2398181013.

The spelling of 25215572 in words is "twenty-five million, two hundred fifteen thousand, five hundred seventy-two".