22059981 has 12 divisors (see below), whose sum is σ = 32963580. Its totient is φ = 14199360.

The previous prime is 22059977. The next prime is 22059997. The reversal of 22059981 is 18995022.

It can be written as a sum of positive squares in 2 ways, for example, as 3861225 + 18198756 = 1965^2 + 4266^2 .

It is not a de Polignac number, because 22059981 - 2² = 22059977 is a prime.

It is a super-2 number, since 2×22059981² = 973285523440722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22059901) 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 11 ways as a sum of consecutive naturals, for example, 42000 + ... + 42521.

It is an arithmetic number, because the mean of its divisors is an integer number (2746965).

Almost surely, 2^22059981 is an apocalyptic number.

It is an amenable number.

22059981 is a deficient number, since it is larger than the sum of its proper divisors (10903599).

22059981 is a wasteful number, since it uses less digits than its factorization.

22059981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84556 (or 84553 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 22059981 is about 4696.8054036760. The cubic root of 22059981 is about 280.4583521721.

The spelling of 22059981 in words is "twenty-two million, fifty-nine thousand, nine hundred eighty-one".