25131541 has 2 divisors, whose sum is σ = 25131542. Its totient is φ = 25131540.

The previous prime is 25131529. The next prime is 25131569. The reversal of 25131541 is 14513152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22944100 + 2187441 = 4790^2 + 1479^2 .

It is a cyclic number.

It is not a de Polignac number, because 25131541 - 2⁷ = 25131413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25131521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565770 + 12565771.

It is an arithmetic number, because the mean of its divisors is an integer number (12565771).

Almost surely, 2^25131541 is an apocalyptic number.

It is an amenable number.

25131541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25131541 is an equidigital number, since it uses as much as digits as its factorization.

25131541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 22.

The square root of 25131541 is about 5013.1368423373. The cubic root of 25131541 is about 292.9137146087.

Adding to 25131541 its reverse (14513152), we get a palindrome (39644693).

The spelling of 25131541 in words is "twenty-five million, one hundred thirty-one thousand, five hundred forty-one".