22491169 has 4 divisors (see below), whose sum is σ = 22697620. Its totient is φ = 22284720.

The previous prime is 22491143. The next prime is 22491191. The reversal of 22491169 is 96119422.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20205025 + 2286144 = 4495^2 + 1512^2 .

It is a cyclic number.

It is not a de Polignac number, because 22491169 - 2⁵ = 22491137 is a prime.

It is a super-2 number, since 2×22491169² = 1011705365973122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22497169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103062 + ... + 103279.

It is an arithmetic number, because the mean of its divisors is an integer number (5674405).

Almost surely, 2^22491169 is an apocalyptic number.

It is an amenable number.

22491169 is a deficient number, since it is larger than the sum of its proper divisors (206451).

22491169 is a wasteful number, since it uses less digits than its factorization.

22491169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206450.

The product of its digits is 7776, while the sum is 34.

The square root of 22491169 is about 4742.4855297618. The cubic root of 22491169 is about 282.2738692126.

The spelling of 22491169 in words is "twenty-two million, four hundred ninety-one thousand, one hundred sixty-nine".