22686431 has 2 divisors, whose sum is σ = 22686432. Its totient is φ = 22686430.

The previous prime is 22686421. The next prime is 22686481. The reversal of 22686431 is 13468622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22686431 - 2¹⁴ = 22670047 is a prime.

It is a super-2 number, since 2×22686431² = 1029348303035522, which contains 22 as substring.

It is equal to p_1429691 and since 22686431 and 1429691 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22686421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11343215 + 11343216.

It is an arithmetic number, because the mean of its divisors is an integer number (11343216).

Almost surely, 2^22686431 is an apocalyptic number.

22686431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22686431 is an equidigital number, since it uses as much as digits as its factorization.

22686431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 22686431 is about 4763.0275035947. The cubic root of 22686431 is about 283.0883906910.

The spelling of 22686431 in words is "twenty-two million, six hundred eighty-six thousand, four hundred thirty-one".