25231181 has 2 divisors, whose sum is σ = 25231182. Its totient is φ = 25231180.

The previous prime is 25231163. The next prime is 25231187. The reversal of 25231181 is 18113252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24661156 + 570025 = 4966^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 25231181 - 2²² = 21036877 is a prime.

It is a super-2 number, since 2×25231181² = 1273224989309522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25231187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12615590 + 12615591.

It is an arithmetic number, because the mean of its divisors is an integer number (12615591).

Almost surely, 2^25231181 is an apocalyptic number.

It is an amenable number.

25231181 is a deficient number, since it is larger than the sum of its proper divisors (1).

25231181 is an equidigital number, since it uses as much as digits as its factorization.

25231181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 23.

The square root of 25231181 is about 5023.0649010340. The cubic root of 25231181 is about 293.3003129440.

The spelling of 25231181 in words is "twenty-five million, two hundred thirty-one thousand, one hundred eighty-one".