22258161 has 6 divisors (see below), whose sum is σ = 32150690. Its totient is φ = 14838768.

The previous prime is 22258141. The next prime is 22258169. The reversal of 22258161 is 16185222.

It is a happy number.

22258161 is a `hidden beast` number, since 2 + 22 + 581 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19633761 + 2624400 = 4431^2 + 1620^2 .

It is not a de Polignac number, because 22258161 - 2⁶ = 22258097 is a prime.

It is a super-2 number, since 2×22258161² = 990851462203842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22258169) 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 5 ways as a sum of consecutive naturals, for example, 1236556 + ... + 1236573.

Almost surely, 2^22258161 is an apocalyptic number.

It is an amenable number.

22258161 is a deficient number, since it is larger than the sum of its proper divisors (9892529).

22258161 is a wasteful number, since it uses less digits than its factorization.

22258161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473135 (or 2473132 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 22258161 is about 4717.8555509892. The cubic root of 22258161 is about 281.2956998332.

The spelling of 22258161 in words is "twenty-two million, two hundred fifty-eight thousand, one hundred sixty-one".