22185529 has 2 divisors, whose sum is σ = 22185530. Its totient is φ = 22185528.

The previous prime is 22185511. The next prime is 22185557. The reversal of 22185529 is 92558122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 3523129 = 4320^2 + 1877^2 .

It is a cyclic number.

It is not a de Polignac number, because 22185529 - 2⁵ = 22185497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22185494 and 22185503.

It is not a weakly prime, because it can be changed into another prime (22185589) 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, 11092764 + 11092765.

It is an arithmetic number, because the mean of its divisors is an integer number (11092765).

Almost surely, 2^22185529 is an apocalyptic number.

It is an amenable number.

22185529 is a deficient number, since it is larger than the sum of its proper divisors (1).

22185529 is an equidigital number, since it uses as much as digits as its factorization.

22185529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The square root of 22185529 is about 4710.1516960709. The cubic root of 22185529 is about 280.9893952086.

The spelling of 22185529 in words is "twenty-two million, one hundred eighty-five thousand, five hundred twenty-nine".