22434581 has 6 divisors (see below), whose sum is σ = 24293250. Its totient is φ = 20708688.

The previous prime is 22434571. The next prime is 22434619. The reversal of 22434581 is 18543422.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 625681 + 21808900 = 791^2 + 4670^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22434581 is a prime.

It is a super-2 number, since 2×22434581² = 1006620849291122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22434521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66206 + ... + 66543.

It is an arithmetic number, because the mean of its divisors is an integer number (4048875).

Almost surely, 2^22434581 is an apocalyptic number.

It is an amenable number.

22434581 is a deficient number, since it is larger than the sum of its proper divisors (1858669).

22434581 is a wasteful number, since it uses less digits than its factorization.

22434581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132775 (or 132762 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 22434581 is about 4736.5157024969. The cubic root of 22434581 is about 282.0369357921.

The spelling of 22434581 in words is "twenty-two million, four hundred thirty-four thousand, five hundred eighty-one".