22468581 has 12 divisors (see below), whose sum is σ = 32743308. Its totient is φ = 14845824.

The previous prime is 22468573. The next prime is 22468601. The reversal of 22468581 is 18586422.

It can be written as a sum of positive squares in 2 ways, for example, as 9400356 + 13068225 = 3066^2 + 3615^2 .

It is not a de Polignac number, because 22468581 - 2³ = 22468573 is a prime.

It is a super-2 number, since 2×22468581² = 1009674264307122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22468541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10030 + ... + 12063.

It is an arithmetic number, because the mean of its divisors is an integer number (2728609).

Almost surely, 2^22468581 is an apocalyptic number.

It is an amenable number.

22468581 is a deficient number, since it is larger than the sum of its proper divisors (10274727).

22468581 is a wasteful number, since it uses less digits than its factorization.

22468581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22212 (or 22209 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 22468581 is about 4740.1034798831. The cubic root of 22468581 is about 282.1793411805.

The spelling of 22468581 in words is "twenty-two million, four hundred sixty-eight thousand, five hundred eighty-one".