25222857 has 16 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 15251600.

The previous prime is 25222807. The next prime is 25222877. The reversal of 25222857 is 75822252.

It is a cyclic number.

It is not a de Polignac number, because 25222857 - 2⁶ = 25222793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (25222807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27232 + ... + 28142.

It is an arithmetic number, because the mean of its divisors is an integer number (2298240).

Almost surely, 2^25222857 is an apocalyptic number.

It is an amenable number.

25222857 is a deficient number, since it is larger than the sum of its proper divisors (11548983).

25222857 is a wasteful number, since it uses less digits than its factorization.

25222857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764.

The product of its digits is 22400, while the sum is 33.

The square root of 25222857 is about 5022.2362548968. The cubic root of 25222857 is about 293.2680552343.

The spelling of 25222857 in words is "twenty-five million, two hundred twenty-two thousand, eight hundred fifty-seven".