25172316 has 48 divisors (see below), whose sum is σ = 70285600. Its totient is φ = 7744896.

The previous prime is 25172311. The next prime is 25172317. The reversal of 25172316 is 61327152.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 25172316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25172311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7561 + ... + 10368.

Almost surely, 2^25172316 is an apocalyptic number.

25172316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25172316 is an abundant number, since it is smaller than the sum of its proper divisors (45113284).

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

25172316 is a wasteful number, since it uses less digits than its factorization.

25172316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17955 (or 17947 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 25172316 is about 5017.2020090883. The cubic root of 25172316 is about 293.0720429182.

Adding to 25172316 its reverse (61327152), we get a palindrome (86499468).

The spelling of 25172316 in words is "twenty-five million, one hundred seventy-two thousand, three hundred sixteen".