22729631 has 2 divisors, whose sum is σ = 22729632. Its totient is φ = 22729630.

The previous prime is 22729613. The next prime is 22729657. The reversal of 22729631 is 13692722.

It is a happy number.

Together with previous prime (22729613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22729631 - 2²² = 18535327 is a prime.

It is a super-2 number, since 2×22729631² = 1033272250792322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22729601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11364815 + 11364816.

It is an arithmetic number, because the mean of its divisors is an integer number (11364816).

Almost surely, 2^22729631 is an apocalyptic number.

22729631 is a deficient number, since it is larger than the sum of its proper divisors (1).

22729631 is an equidigital number, since it uses as much as digits as its factorization.

22729631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 22729631 is about 4767.5602775424. The cubic root of 22729631 is about 283.2679644660.

The spelling of 22729631 in words is "twenty-two million, seven hundred twenty-nine thousand, six hundred thirty-one".