25031232 has 42 divisors (see below), whose sum is σ = 71749158. Its totient is φ = 8343552.

The previous prime is 25031231. The next prime is 25031233. The reversal of 25031232 is 23213052.

It is an interprime number because it is at equal distance from previous prime (25031231) and next prime (25031233).

It can be written as a sum of positive squares in only one way, i.e., 22127616 + 2903616 = 4704^2 + 1704^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (25031231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21153 + ... + 22304.

Almost surely, 2^25031232 is an apocalyptic number.

It is an amenable number.

25031232 is an abundant number, since it is smaller than the sum of its proper divisors (46717926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25031232 is a wasteful number, since it uses less digits than its factorization.

25031232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43475 (or 43462 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 25031232 is about 5003.1222251710. The cubic root of 25031232 is about 292.5234870467.

Adding to 25031232 its reverse (23213052), we get a palindrome (48244284).

The spelling of 25031232 in words is "twenty-five million, thirty-one thousand, two hundred thirty-two".