25231187 has 2 divisors, whose sum is σ = 25231188. Its totient is φ = 25231186.

The previous prime is 25231181. The next prime is 25231201. The reversal of 25231187 is 78113252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25231187 - 2²⁴ = 8453971 is a prime.

It is a super-2 number, since 2×25231187² = 1273225594857938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25231181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12615593 + 12615594.

It is an arithmetic number, because the mean of its divisors is an integer number (12615594).

Almost surely, 2^25231187 is an apocalyptic number.

25231187 is a deficient number, since it is larger than the sum of its proper divisors (1).

25231187 is an equidigital number, since it uses as much as digits as its factorization.

25231187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 25231187 is about 5023.0654982789. The cubic root of 25231187 is about 293.3003361930.

The spelling of 25231187 in words is "twenty-five million, two hundred thirty-one thousand, one hundred eighty-seven".