22364731 has 4 divisors (see below), whose sum is σ = 22450032. Its totient is φ = 22279432.

The previous prime is 22364723. The next prime is 22364737. The reversal of 22364731 is 13746322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13746322 = 2 ⋅6873161.

It is a cyclic number.

It is not a de Polignac number, because 22364731 - 2³ = 22364723 is a prime.

It is a super-2 number, since 2×22364731² = 1000362385404722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22364731.

It is not an unprimeable number, because it can be changed into a prime (22364737) 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, 42256 + ... + 42781.

It is an arithmetic number, because the mean of its divisors is an integer number (5612508).

Almost surely, 2^22364731 is an apocalyptic number.

22364731 is a deficient number, since it is larger than the sum of its proper divisors (85301).

22364731 is an equidigital number, since it uses as much as digits as its factorization.

22364731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85300.

The product of its digits is 6048, while the sum is 28.

The square root of 22364731 is about 4729.1363905051. The cubic root of 22364731 is about 281.7439244362.

The spelling of 22364731 in words is "twenty-two million, three hundred sixty-four thousand, seven hundred thirty-one".