22075581 has 16 divisors (see below), whose sum is σ = 32194368. Its totient is φ = 13344000.

The previous prime is 22075553. The next prime is 22075591. The reversal of 22075581 is 18557022.

It is a de Polignac number, because none of the positive numbers 2^k-22075581 is a prime.

It is a super-2 number, since 2×22075581² = 974662552975122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22075531) 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, 17781 + ... + 18981.

It is an arithmetic number, because the mean of its divisors is an integer number (2012148).

Almost surely, 2^22075581 is an apocalyptic number.

It is an amenable number.

22075581 is a deficient number, since it is larger than the sum of its proper divisors (10118787).

22075581 is a wasteful number, since it uses less digits than its factorization.

22075581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 22075581 is about 4698.4658134331. The cubic root of 22075581 is about 280.5244465080.

The spelling of 22075581 in words is "twenty-two million, seventy-five thousand, five hundred eighty-one".