25495931 has 2 divisors, whose sum is σ = 25495932. Its totient is φ = 25495930.

The previous prime is 25495913. The next prime is 25495933. The reversal of 25495931 is 13959452.

Together with previous prime (25495913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25495931 - 2¹⁴ = 25479547 is a prime.

It is a super-2 number, since 2×25495931² = 1300084995113522, which contains 22 as substring.

Together with 25495933, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1594946 and since 25495931 and 1594946 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25495933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12747965 + 12747966.

It is an arithmetic number, because the mean of its divisors is an integer number (12747966).

Almost surely, 2^25495931 is an apocalyptic number.

25495931 is a deficient number, since it is larger than the sum of its proper divisors (1).

25495931 is an equidigital number, since it uses as much as digits as its factorization.

25495931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 38.

The square root of 25495931 is about 5049.3495620723. The cubic root of 25495931 is about 294.3226092937.

The spelling of 25495931 in words is "twenty-five million, four hundred ninety-five thousand, nine hundred thirty-one".