25245431 has 2 divisors, whose sum is σ = 25245432. Its totient is φ = 25245430.

The previous prime is 25245427. The next prime is 25245491. The reversal of 25245431 is 13454252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25245431 - 2² = 25245427 is a prime.

It is a super-2 number, since 2×25245431² = 1274663572751522, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_1580255 and since 25245431 and 1580255 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25245431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25245491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12622715 + 12622716.

It is an arithmetic number, because the mean of its divisors is an integer number (12622716).

Almost surely, 2^25245431 is an apocalyptic number.

25245431 is a deficient number, since it is larger than the sum of its proper divisors (1).

25245431 is an equidigital number, since it uses as much as digits as its factorization.

25245431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 26.

The square root of 25245431 is about 5024.4831574999. The cubic root of 25245431 is about 293.3555190118.

Adding to 25245431 its reverse (13454252), we get a palindrome (38699683).

The spelling of 25245431 in words is "twenty-five million, two hundred forty-five thousand, four hundred thirty-one".