22187029 has 2 divisors, whose sum is σ = 22187030. Its totient is φ = 22187028.

The previous prime is 22187021. The next prime is 22187047. The reversal of 22187029 is 92078122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16184529 + 6002500 = 4023^2 + 2450^2 .

It is a cyclic number.

It is not a de Polignac number, because 22187029 - 2³ = 22187021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22187021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11093514 + 11093515.

It is an arithmetic number, because the mean of its divisors is an integer number (11093515).

Almost surely, 2^22187029 is an apocalyptic number.

It is an amenable number.

22187029 is a deficient number, since it is larger than the sum of its proper divisors (1).

22187029 is an equidigital number, since it uses as much as digits as its factorization.

22187029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 22187029 is about 4710.3109239200. The cubic root of 22187029 is about 280.9957277838.

The spelling of 22187029 in words is "twenty-two million, one hundred eighty-seven thousand, twenty-nine".