22127429 has 2 divisors, whose sum is σ = 22127430. Its totient is φ = 22127428.

The previous prime is 22127401. The next prime is 22127437. The reversal of 22127429 is 92472122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13890529 + 8236900 = 3727^2 + 2870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22127429 is a prime.

It is a super-2 number, since 2×22127429² = 979246228300082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22147429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11063714 + 11063715.

It is an arithmetic number, because the mean of its divisors is an integer number (11063715).

Almost surely, 2^22127429 is an apocalyptic number.

It is an amenable number.

22127429 is a deficient number, since it is larger than the sum of its proper divisors (1).

22127429 is an equidigital number, since it uses as much as digits as its factorization.

22127429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 22127429 is about 4703.9801232573. The cubic root of 22127429 is about 280.7438935001.

The spelling of 22127429 in words is "twenty-two million, one hundred twenty-seven thousand, four hundred twenty-nine".