22210729 has 2 divisors, whose sum is σ = 22210730. Its totient is φ = 22210728.

The previous prime is 22210681. The next prime is 22210757. The reversal of 22210729 is 92701222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21874329 + 336400 = 4677^2 + 580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22210729 is a prime.

It is a super-2 number, since 2×22210729² = 986632965422882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22210129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105364 + 11105365.

It is an arithmetic number, because the mean of its divisors is an integer number (11105365).

Almost surely, 2^22210729 is an apocalyptic number.

It is an amenable number.

22210729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22210729 is an equidigital number, since it uses as much as digits as its factorization.

22210729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 22210729 is about 4712.8260099435. The cubic root of 22210729 is about 281.0957446136.

The spelling of 22210729 in words is "twenty-two million, two hundred ten thousand, seven hundred twenty-nine".