21883081 has 16 divisors (see below), whose sum is σ = 24897600. Its totient is φ = 19051200.

The previous prime is 21883073. The next prime is 21883111. The reversal of 21883081 is 18038812.

It is a cyclic number.

It is not a de Polignac number, because 21883081 - 2³ = 21883073 is a prime.

It is a super-2 number, since 2×21883081² = 957738468105122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21883031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57550 + ... + 57928.

It is an arithmetic number, because the mean of its divisors is an integer number (1556100).

Almost surely, 2^21883081 is an apocalyptic number.

It is an amenable number.

21883081 is a deficient number, since it is larger than the sum of its proper divisors (3014519).

21883081 is a wasteful number, since it uses less digits than its factorization.

21883081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 21883081 is about 4677.9355489361. The cubic root of 21883081 is about 279.7066698532.

The spelling of 21883081 in words is "twenty-one million, eight hundred eighty-three thousand, eighty-one".