22865231 has 2 divisors, whose sum is σ = 22865232. Its totient is φ = 22865230.

The previous prime is 22865203. The next prime is 22865233. The reversal of 22865231 is 13256822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22865231 is a prime.

It is a super-2 number, since 2×22865231² = 1045637577366722, which contains 22 as substring.

Together with 22865233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22865194 and 22865203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22865233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11432615 + 11432616.

It is an arithmetic number, because the mean of its divisors is an integer number (11432616).

Almost surely, 2^22865231 is an apocalyptic number.

22865231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22865231 is an equidigital number, since it uses as much as digits as its factorization.

22865231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 22865231 is about 4781.7602407482. The cubic root of 22865231 is about 283.8301528564.

The spelling of 22865231 in words is "twenty-two million, eight hundred sixty-five thousand, two hundred thirty-one".