22051881 has 12 divisors (see below), whose sum is σ = 32880640. Its totient is φ = 14226840.

The previous prime is 22051879. The next prime is 22051903. The reversal of 22051881 is 18815022.

It is not a de Polignac number, because 22051881 - 2¹ = 22051879 is a prime.

It is a super-2 number, since 2×22051881² = 972570911276322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22051811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39241 + ... + 39798.

Almost surely, 2^22051881 is an apocalyptic number.

It is an amenable number.

22051881 is a deficient number, since it is larger than the sum of its proper divisors (10828759).

22051881 is a wasteful number, since it uses less digits than its factorization.

22051881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79076 (or 79073 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 22051881 is about 4695.9430362814. The cubic root of 22051881 is about 280.4240216687.

The spelling of 22051881 in words is "twenty-two million, fifty-one thousand, eight hundred eighty-one".