25503157 has 2 divisors, whose sum is σ = 25503158. Its totient is φ = 25503156.

The previous prime is 25503131. The next prime is 25503167. The reversal of 25503157 is 75130552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23677956 + 1825201 = 4866^2 + 1351^2 .

It is a cyclic number.

It is not a de Polignac number, because 25503157 - 2¹⁹ = 24978869 is a prime.

It is a super-2 number, since 2×25503157² = 1300822033933298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25503167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751578 + 12751579.

It is an arithmetic number, because the mean of its divisors is an integer number (12751579).

Almost surely, 2^25503157 is an apocalyptic number.

It is an amenable number.

25503157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25503157 is an equidigital number, since it uses as much as digits as its factorization.

25503157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 25503157 is about 5050.0650490860. The cubic root of 25503157 is about 294.3504120868.

The spelling of 25503157 in words is "twenty-five million, five hundred three thousand, one hundred fifty-seven".