22161235 has 4 divisors (see below), whose sum is σ = 26593488. Its totient is φ = 17728984.

The previous prime is 22161229. The next prime is 22161241. The reversal of 22161235 is 53216122.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22161229) and next prime (22161241).

It is a cyclic number.

It is not a de Polignac number, because 22161235 - 2¹⁷ = 22030163 is a prime.

It is a super-2 number, since 2×22161235² = 982240673450450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2216119 + ... + 2216128.

It is an arithmetic number, because the mean of its divisors is an integer number (6648372).

Almost surely, 2^22161235 is an apocalyptic number.

22161235 is a deficient number, since it is larger than the sum of its proper divisors (4432253).

22161235 is an equidigital number, since it uses as much as digits as its factorization.

22161235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432252.

The product of its digits is 720, while the sum is 22.

The square root of 22161235 is about 4707.5720918537. The cubic root of 22161235 is about 280.8867930486.

Adding to 22161235 its reverse (53216122), we get a palindrome (75377357).

The spelling of 22161235 in words is "twenty-two million, one hundred sixty-one thousand, two hundred thirty-five".