22529729 has 2 divisors, whose sum is σ = 22529730. Its totient is φ = 22529728.

The previous prime is 22529701. The next prime is 22529761. The reversal of 22529729 is 92792522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20720704 + 1809025 = 4552^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 22529729 - 2¹⁶ = 22464193 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22529692 and 22529701.

It is not a weakly prime, because it can be changed into another prime (22529329) 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, 11264864 + 11264865.

It is an arithmetic number, because the mean of its divisors is an integer number (11264865).

Almost surely, 2^22529729 is an apocalyptic number.

It is an amenable number.

22529729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22529729 is an equidigital number, since it uses as much as digits as its factorization.

22529729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 22529729 is about 4746.5491675532. The cubic root of 22529729 is about 282.4350919872.

The spelling of 22529729 in words is "twenty-two million, five hundred twenty-nine thousand, seven hundred twenty-nine".