22161275 has 12 divisors (see below), whose sum is σ = 27602400. Its totient is φ = 17650080.

The previous prime is 22161241. The next prime is 22161281. The reversal of 22161275 is 57216122.

It is not a de Polignac number, because 22161275 - 2²⁴ = 5384059 is a prime.

It is a super-2 number, since 2×22161275² = 982244219251250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4121 + ... + 7829.

It is an arithmetic number, because the mean of its divisors is an integer number (2300200).

Almost surely, 2^22161275 is an apocalyptic number.

22161275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22161275 is a deficient number, since it is larger than the sum of its proper divisors (5441125).

22161275 is a wasteful number, since it uses less digits than its factorization.

22161275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958 (or 3953 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 22161275 is about 4707.5763403263. The cubic root of 22161275 is about 280.8869620443.

Adding to 22161275 its reverse (57216122), we get a palindrome (79377397).

The spelling of 22161275 in words is "twenty-two million, one hundred sixty-one thousand, two hundred seventy-five".