22724431 has 2 divisors, whose sum is σ = 22724432. Its totient is φ = 22724430.

The previous prime is 22724423. The next prime is 22724441. The reversal of 22724431 is 13442722.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22724431 - 2³ = 22724423 is a prime.

It is a super-2 number, since 2×22724431² = 1032799528547522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22724396 and 22724405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22724441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11362215 + 11362216.

It is an arithmetic number, because the mean of its divisors is an integer number (11362216).

Almost surely, 2^22724431 is an apocalyptic number.

22724431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22724431 is an equidigital number, since it uses as much as digits as its factorization.

22724431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 25.

The square root of 22724431 is about 4767.0148940401. The cubic root of 22724431 is about 283.2463611565.

The spelling of 22724431 in words is "twenty-two million, seven hundred twenty-four thousand, four hundred thirty-one".