22724231 has 2 divisors, whose sum is σ = 22724232. Its totient is φ = 22724230.

The previous prime is 22724183. The next prime is 22724267. The reversal of 22724231 is 13242722.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22724231 - 2¹⁴ = 22707847 is a prime.

It is a super-2 number, since 2×22724231² = 1032781349082722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22724197 and 22724206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22724431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11362115 + 11362116.

It is an arithmetic number, because the mean of its divisors is an integer number (11362116).

Almost surely, 2^22724231 is an apocalyptic number.

22724231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22724231 is an equidigital number, since it uses as much as digits as its factorization.

22724231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 23.

The square root of 22724231 is about 4766.9939165055. The cubic root of 22724231 is about 283.2455301942.

Adding to 22724231 its reverse (13242722), we get a palindrome (35966953).

The spelling of 22724231 in words is "twenty-two million, seven hundred twenty-four thousand, two hundred thirty-one".