25221232 has 20 divisors (see below), whose sum is σ = 50059296. Its totient is φ = 12302720.

The previous prime is 25221223. The next prime is 25221239. The reversal of 25221232 is 23212252.

It is a super-2 number, since 2×25221232² = 1272221087195648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221239) 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, 18568 + ... + 19879.

Almost surely, 2^25221232 is an apocalyptic number.

It is an amenable number.

25221232 is a deficient number, since it is larger than the sum of its proper divisors (24838064).

25221232 is a wasteful number, since it uses less digits than its factorization.

25221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38496 (or 38490 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 25221232 is about 5022.0744717696. The cubic root of 25221232 is about 293.2617570999.

Adding to 25221232 its reverse (23212252), we get a palindrome (48433484).

The spelling of 25221232 in words is "twenty-five million, two hundred twenty-one thousand, two hundred thirty-two".