22081429 has 2 divisors, whose sum is σ = 22081430. Its totient is φ = 22081428.

The previous prime is 22081387. The next prime is 22081459. The reversal of 22081429 is 92418022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19342404 + 2739025 = 4398^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 22081429 - 2⁹ = 22080917 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22081397 and 22081406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22081459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11040714 + 11040715.

It is an arithmetic number, because the mean of its divisors is an integer number (11040715).

Almost surely, 2^22081429 is an apocalyptic number.

It is an amenable number.

22081429 is a deficient number, since it is larger than the sum of its proper divisors (1).

22081429 is an equidigital number, since it uses as much as digits as its factorization.

22081429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 22081429 is about 4699.0881030259. The cubic root of 22081429 is about 280.5492153861.

It can be divided in two parts, 2208142 and 9, that added together give a triangular number (2208151 = T₂₁₀₁).

The spelling of 22081429 in words is "twenty-two million, eighty-one thousand, four hundred twenty-nine".