25911157 has 2 divisors, whose sum is σ = 25911158. Its totient is φ = 25911156.

The previous prime is 25911113. The next prime is 25911161. The reversal of 25911157 is 75111952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13793796 + 12117361 = 3714^2 + 3481^2 .

It is a cyclic number.

It is not a de Polignac number, because 25911157 - 2⁷ = 25911029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25911167) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12955578 + 12955579.

It is an arithmetic number, because the mean of its divisors is an integer number (12955579).

Almost surely, 2^25911157 is an apocalyptic number.

It is an amenable number.

25911157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25911157 is an equidigital number, since it uses as much as digits as its factorization.

25911157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 31.

The square root of 25911157 is about 5090.3002858378. The cubic root of 25911157 is about 295.9117896697.

The spelling of 25911157 in words is "twenty-five million, nine hundred eleven thousand, one hundred fifty-seven".