25516157 has 4 divisors (see below), whose sum is σ = 26109600. Its totient is φ = 24922716.

The previous prime is 25516147. The next prime is 25516163. The reversal of 25516157 is 75161552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25516157 - 2⁶ = 25516093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25516147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296657 + ... + 296742.

It is an arithmetic number, because the mean of its divisors is an integer number (6527400).

Almost surely, 2^25516157 is an apocalyptic number.

It is an amenable number.

25516157 is a deficient number, since it is larger than the sum of its proper divisors (593443).

25516157 is an equidigital number, since it uses as much as digits as its factorization.

25516157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593442.

The product of its digits is 10500, while the sum is 32.

The square root of 25516157 is about 5051.3519972380. The cubic root of 25516157 is about 294.4004177306.

The spelling of 25516157 in words is "twenty-five million, five hundred sixteen thousand, one hundred fifty-seven".