22497749 has 16 divisors (see below), whose sum is σ = 25080192. Its totient is φ = 20072448.

The previous prime is 22497737. The next prime is 22497751. The reversal of 22497749 is 94779422.

It is a cyclic number.

It is not a de Polignac number, because 22497749 - 2⁴ = 22497733 is a prime.

It is a super-2 number, since 2×22497749² = 1012297420134002, 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 (22497719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63557 + ... + 63909.

It is an arithmetic number, because the mean of its divisors is an integer number (1567512).

Almost surely, 2^22497749 is an apocalyptic number.

It is an amenable number.

22497749 is a deficient number, since it is larger than the sum of its proper divisors (2582443).

22497749 is a wasteful number, since it uses less digits than its factorization.

22497749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556.

The product of its digits is 254016, while the sum is 44.

The square root of 22497749 is about 4743.1792080840. The cubic root of 22497749 is about 282.3013938077.

The spelling of 22497749 in words is "twenty-two million, four hundred ninety-seven thousand, seven hundred forty-nine".