22730831 has 4 divisors (see below), whose sum is σ = 23719152. Its totient is φ = 21742512.

The previous prime is 22730797. The next prime is 22730837. The reversal of 22730831 is 13803722.

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 22730831 - 2⁶ = 22730767 is a prime.

It is a super-2 number, since 2×22730831² = 1033381355901122, 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 22730831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22730837) 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, 494126 + ... + 494171.

It is an arithmetic number, because the mean of its divisors is an integer number (5929788).

Almost surely, 2^22730831 is an apocalyptic number.

22730831 is a deficient number, since it is larger than the sum of its proper divisors (988321).

22730831 is an equidigital number, since it uses as much as digits as its factorization.

22730831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988320.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 22730831 is about 4767.6861264139. The cubic root of 22730831 is about 283.2729493772.

The spelling of 22730831 in words is "twenty-two million, seven hundred thirty thousand, eight hundred thirty-one".