25157317 has 2 divisors, whose sum is σ = 25157318. Its totient is φ = 25157316.

The previous prime is 25157291. The next prime is 25157323. The reversal of 25157317 is 71375152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22600516 + 2556801 = 4754^2 + 1599^2 .

It is a cyclic number.

It is not a de Polignac number, because 25157317 - 2⁷ = 25157189 is a prime.

It is equal to p_1575157 and since 25157317 and 1575157 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25157017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12578658 + 12578659.

It is an arithmetic number, because the mean of its divisors is an integer number (12578659).

Almost surely, 2^25157317 is an apocalyptic number.

It is an amenable number.

25157317 is a deficient number, since it is larger than the sum of its proper divisors (1).

25157317 is an equidigital number, since it uses as much as digits as its factorization.

25157317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7350, while the sum is 31.

The square root of 25157317 is about 5015.7070289242. The cubic root of 25157317 is about 293.0138220677.

The spelling of 25157317 in words is "twenty-five million, one hundred fifty-seven thousand, three hundred seventeen".