22202881 has 4 divisors (see below), whose sum is σ = 22224832. Its totient is φ = 22180932.

The previous prime is 22202857. The next prime is 22202891. The reversal of 22202881 is 18820222.

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 3-Lehmer number, since φ(22202881) divides (22202881-1)³.

It is a cyclic number.

It is not a de Polignac number, because 22202881 - 2¹⁷ = 22071809 is a prime.

It is a super-2 number, since 2×22202881² = 985935849400322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22202801) 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, 9381 + ... + 11506.

It is an arithmetic number, because the mean of its divisors is an integer number (5556208).

Almost surely, 2^22202881 is an apocalyptic number.

It is an amenable number.

22202881 is a deficient number, since it is larger than the sum of its proper divisors (21951).

22202881 is a wasteful number, since it uses less digits than its factorization.

22202881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21950.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 22202881 is about 4711.9933149358. The cubic root of 22202881 is about 281.0626329992.

The spelling of 22202881 in words is "twenty-two million, two hundred two thousand, eight hundred eighty-one".