25131036 has 24 divisors (see below), whose sum is σ = 67016320. Its totient is φ = 7180272.

The previous prime is 25131031. The next prime is 25131037. The reversal of 25131036 is 63013152.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149506 + ... + 149673.

Almost surely, 2^25131036 is an apocalyptic number.

It is an amenable number.

25131036 is an abundant number, since it is smaller than the sum of its proper divisors (41885284).

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

25131036 is a wasteful number, since it uses less digits than its factorization.

25131036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299193 (or 299191 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 25131036 is about 5013.0864744187. The cubic root of 25131036 is about 292.9117526331.

Adding to 25131036 its reverse (63013152), we get a palindrome (88144188).

The spelling of 25131036 in words is "twenty-five million, one hundred thirty-one thousand, thirty-six".