22497439 has 4 divisors (see below), whose sum is σ = 22627656. Its totient is φ = 22367224.

The previous prime is 22497437. The next prime is 22497457. The reversal of 22497439 is 93479422.

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

It is a cyclic number.

It is not a de Polignac number, because 22497439 - 2¹ = 22497437 is a prime.

It is a super-2 number, since 2×22497439² = 1012269523117442, 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 (22497437) 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, 64849 + ... + 65194.

It is an arithmetic number, because the mean of its divisors is an integer number (5656914).

Almost surely, 2^22497439 is an apocalyptic number.

22497439 is a deficient number, since it is larger than the sum of its proper divisors (130217).

22497439 is a wasteful number, since it uses less digits than its factorization.

22497439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130216.

The product of its digits is 108864, while the sum is 40.

The square root of 22497439 is about 4743.1465294675. The cubic root of 22497439 is about 282.3000971767.

The spelling of 22497439 in words is "twenty-two million, four hundred ninety-seven thousand, four hundred thirty-nine".