22813731 has 10 divisors (see below), whose sum is σ = 34079892. Its totient is φ = 15209100.

The previous prime is 22813717. The next prime is 22813733. The reversal of 22813731 is 13731822.

It is not a de Polignac number, because 22813731 - 2⁷ = 22813603 is a prime.

It is a super-2 number, since 2×22813731² = 1040932644280722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 22813695 and 22813704.

It is not an unprimeable number, because it can be changed into a prime (22813733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 140745 + ... + 140906.

Almost surely, 2^22813731 is an apocalyptic number.

22813731 is a deficient number, since it is larger than the sum of its proper divisors (11266161).

22813731 is an equidigital number, since it uses as much as digits as its factorization.

22813731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281663 (or 281654 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 22813731 is about 4776.3721588670. The cubic root of 22813731 is about 283.6168998041.

The spelling of 22813731 in words is "twenty-two million, eight hundred thirteen thousand, seven hundred thirty-one".