22161585 has 16 divisors (see below), whose sum is σ = 35959680. Its totient is φ = 11652480.

The previous prime is 22161577. The next prime is 22161599. The reversal of 22161585 is 58516122.

It is not a de Polignac number, because 22161585 - 2³ = 22161577 is a prime.

It is a super-2 number, since 2×22161585² = 982271699424450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9340 + ... + 11469.

It is an arithmetic number, because the mean of its divisors is an integer number (2247480).

Almost surely, 2^22161585 is an apocalyptic number.

It is an amenable number.

22161585 is a deficient number, since it is larger than the sum of its proper divisors (13798095).

22161585 is a wasteful number, since it uses less digits than its factorization.

22161585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20888.

The product of its digits is 4800, while the sum is 30.

The square root of 22161585 is about 4707.6092658588. The cubic root of 22161585 is about 280.8882717546. Note that the first 3 decimals are identical.

The spelling of 22161585 in words is "twenty-two million, one hundred sixty-one thousand, five hundred eighty-five".