22455881 has 4 divisors (see below), whose sum is σ = 25663872. Its totient is φ = 19247892.

The previous prime is 22455871. The next prime is 22455883. The reversal of 22455881 is 18855422.

It is a happy number.

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 22455881 - 2¹⁴ = 22439497 is a prime.

It is a super-2 number, since 2×22455881² = 1008533182972322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22455883) 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, 1603985 + ... + 1603998.

It is an arithmetic number, because the mean of its divisors is an integer number (6415968).

Almost surely, 2^22455881 is an apocalyptic number.

It is an amenable number.

22455881 is a deficient number, since it is larger than the sum of its proper divisors (3207991).

22455881 is an equidigital number, since it uses as much as digits as its factorization.

22455881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207990.

The product of its digits is 25600, while the sum is 35.

The square root of 22455881 is about 4738.7636573267. The cubic root of 22455881 is about 282.1261653992.

The spelling of 22455881 in words is "twenty-two million, four hundred fifty-five thousand, eight hundred eighty-one".