25218772 has 24 divisors (see below), whose sum is σ = 45440640. Its totient is φ = 12239040.

The previous prime is 25218761. The next prime is 25218797. The reversal of 25218772 is 27781252.

It is a super-2 number, since 2×25218772² = 1271972922375968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59979 + ... + 60397.

It is an arithmetic number, because the mean of its divisors is an integer number (1893360).

Almost surely, 2^25218772 is an apocalyptic number.

It is an amenable number.

25218772 is a deficient number, since it is larger than the sum of its proper divisors (20221868).

25218772 is a wasteful number, since it uses less digits than its factorization.

25218772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 829 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 25218772 is about 5021.8295470874. The cubic root of 25218772 is about 293.2522221787.

The spelling of 25218772 in words is "twenty-five million, two hundred eighteen thousand, seven hundred seventy-two".