25312137 has 4 divisors (see below), whose sum is σ = 33749520. Its totient is φ = 16874756.

The previous prime is 25312117. The next prime is 25312141. The reversal of 25312137 is 73121352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25312137 - 2⁶ = 25312073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25312117) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4218687 + ... + 4218692.

It is an arithmetic number, because the mean of its divisors is an integer number (8437380).

Almost surely, 2^25312137 is an apocalyptic number.

It is an amenable number.

25312137 is a deficient number, since it is larger than the sum of its proper divisors (8437383).

25312137 is an equidigital number, since it uses as much as digits as its factorization.

25312137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437382.

The product of its digits is 1260, while the sum is 24.

The square root of 25312137 is about 5031.1168740152. The cubic root of 25312137 is about 293.6136695284.

Adding to 25312137 its reverse (73121352), we get a palindrome (98433489).

The spelling of 25312137 in words is "twenty-five million, three hundred twelve thousand, one hundred thirty-seven".