22158229 has 2 divisors, whose sum is σ = 22158230. Its totient is φ = 22158228.

The previous prime is 22158121. The next prime is 22158239. The reversal of 22158229 is 92285122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22071204 + 87025 = 4698^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 22158229 - 2²¹ = 20061077 is a prime.

It is a super-2 number, since 2×22158229² = 981974224832882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22158229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22158239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11079114 + 11079115.

It is an arithmetic number, because the mean of its divisors is an integer number (11079115).

Almost surely, 2^22158229 is an apocalyptic number.

It is an amenable number.

22158229 is a deficient number, since it is larger than the sum of its proper divisors (1).

22158229 is an equidigital number, since it uses as much as digits as its factorization.

22158229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 22158229 is about 4707.2528081674. The cubic root of 22158229 is about 280.8740924345.

The spelling of 22158229 in words is "twenty-two million, one hundred fifty-eight thousand, two hundred twenty-nine".