22566729 has 16 divisors (see below), whose sum is σ = 31186944. Its totient is φ = 14499600.

The previous prime is 22566697. The next prime is 22566763. The reversal of 22566729 is 92766522.

It is a happy number.

It is not a de Polignac number, because 22566729 - 2⁵ = 22566697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22566779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39802 + ... + 40364.

It is an arithmetic number, because the mean of its divisors is an integer number (1949184).

Almost surely, 2^22566729 is an apocalyptic number.

It is an amenable number.

22566729 is a deficient number, since it is larger than the sum of its proper divisors (8620215).

22566729 is a wasteful number, since it uses less digits than its factorization.

22566729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its digits is 90720, while the sum is 39.

The square root of 22566729 is about 4750.4451370372. The cubic root of 22566729 is about 282.5896194115.

The spelling of 22566729 in words is "twenty-two million, five hundred sixty-six thousand, seven hundred twenty-nine".