25220881 has 4 divisors (see below), whose sum is σ = 28823872. Its totient is φ = 21617892.

The previous prime is 25220869. The next prime is 25220929. The reversal of 25220881 is 18802252.

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 25220881 - 2⁷ = 25220753 is a prime.

It is a super-2 number, since 2×25220881² = 1272185676832322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25220821) 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, 1801485 + ... + 1801498.

It is an arithmetic number, because the mean of its divisors is an integer number (7205968).

Almost surely, 2^25220881 is an apocalyptic number.

It is an amenable number.

25220881 is a deficient number, since it is larger than the sum of its proper divisors (3602991).

25220881 is an equidigital number, since it uses as much as digits as its factorization.

25220881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602990.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 25220881 is about 5022.0395259297. The cubic root of 25220881 is about 293.2603966674.

The spelling of 25220881 in words is "twenty-five million, two hundred twenty thousand, eight hundred eighty-one".