22045731 has 4 divisors (see below), whose sum is σ = 29394312. Its totient is φ = 14697152.

The previous prime is 22045729. The next prime is 22045733. The reversal of 22045731 is 13754022.

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

It is an interprime number because it is at equal distance from previous prime (22045729) and next prime (22045733).

It is a cyclic number.

It is not a de Polignac number, because 22045731 - 2¹ = 22045729 is a prime.

It is a super-2 number, since 2×22045731² = 972028510648722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22045733) 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, 3674286 + ... + 3674291.

It is an arithmetic number, because the mean of its divisors is an integer number (7348578).

Almost surely, 2^22045731 is an apocalyptic number.

22045731 is a deficient number, since it is larger than the sum of its proper divisors (7348581).

22045731 is an equidigital number, since it uses as much as digits as its factorization.

22045731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7348580.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 22045731 is about 4695.2881700701. The cubic root of 22045731 is about 280.3979503012.

Adding to 22045731 its reverse (13754022), we get a palindrome (35799753).

The spelling of 22045731 in words is "twenty-two million, forty-five thousand, seven hundred thirty-one".