25221163 has 8 divisors (see below), whose sum is σ = 28033776. Its totient is φ = 22495200.

The previous prime is 25221137. The next prime is 25221173. The reversal of 25221163 is 36112252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25221163 is a prime.

It is a super-2 number, since 2×25221163² = 1272214126145138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25221103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21048 + ... + 22213.

It is an arithmetic number, because the mean of its divisors is an integer number (3504222).

Almost surely, 2^25221163 is an apocalyptic number.

25221163 is a deficient number, since it is larger than the sum of its proper divisors (2812613).

25221163 is a wasteful number, since it uses less digits than its factorization.

25221163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43325.

The product of its digits is 720, while the sum is 22.

The square root of 25221163 is about 5022.0676020938. The cubic root of 25221163 is about 293.2614896655.

The spelling of 25221163 in words is "twenty-five million, two hundred twenty-one thousand, one hundred sixty-three".