22945231 has 4 divisors (see below), whose sum is σ = 22955152. Its totient is φ = 22935312.

The previous prime is 22945201. The next prime is 22945249. The reversal of 22945231 is 13254922.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22945231 - 2¹³ = 22937039 is a prime.

It is a super-2 number, since 2×22945231² = 1052967251286722, 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 22945231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22945201) 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, 550 + ... + 6796.

It is an arithmetic number, because the mean of its divisors is an integer number (5738788).

Almost surely, 2^22945231 is an apocalyptic number.

22945231 is a deficient number, since it is larger than the sum of its proper divisors (9921).

22945231 is an equidigital number, since it uses as much as digits as its factorization.

22945231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9920.

The product of its digits is 4320, while the sum is 28.

The square root of 22945231 is about 4790.1180570003. The cubic root of 22945231 is about 284.1607855995.

The spelling of 22945231 in words is "twenty-two million, nine hundred forty-five thousand, two hundred thirty-one".