25522257 has 4 divisors (see below), whose sum is σ = 34029680. Its totient is φ = 17014836.

The previous prime is 25522229. The next prime is 25522271. The reversal of 25522257 is 75222552.

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 not a de Polignac number, because 25522257 - 2⁷ = 25522129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25522957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4253707 + ... + 4253712.

It is an arithmetic number, because the mean of its divisors is an integer number (8507420).

Almost surely, 2^25522257 is an apocalyptic number.

It is an amenable number.

25522257 is a deficient number, since it is larger than the sum of its proper divisors (8507423).

25522257 is an equidigital number, since it uses as much as digits as its factorization.

25522257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8507422.

The product of its digits is 14000, while the sum is 30.

The square root of 25522257 is about 5051.9557599013. The cubic root of 25522257 is about 294.4238760628.

The spelling of 25522257 in words is "twenty-five million, five hundred twenty-two thousand, two hundred fifty-seven".