22397231 has 2 divisors, whose sum is σ = 22397232. Its totient is φ = 22397230.

The previous prime is 22397227. The next prime is 22397237. The reversal of 22397231 is 13279322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22397231 - 2² = 22397227 is a prime.

It is a super-2 number, since 2×22397231² = 1003271912934722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22397194 and 22397203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22397237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11198615 + 11198616.

It is an arithmetic number, because the mean of its divisors is an integer number (11198616).

Almost surely, 2^22397231 is an apocalyptic number.

22397231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22397231 is an equidigital number, since it uses as much as digits as its factorization.

22397231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 29.

The square root of 22397231 is about 4732.5712884224. The cubic root of 22397231 is about 281.8803333455.

The spelling of 22397231 in words is "twenty-two million, three hundred ninety-seven thousand, two hundred thirty-one".