22029181 has 2 divisors, whose sum is σ = 22029182. Its totient is φ = 22029180.

The previous prime is 22029173. The next prime is 22029197. The reversal of 22029181 is 18192022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14516100 + 7513081 = 3810^2 + 2741^2 .

It is a cyclic number.

It is not a de Polignac number, because 22029181 - 2³ = 22029173 is a prime.

It is a super-2 number, since 2×22029181² = 970569631061522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22029121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11014590 + 11014591.

It is an arithmetic number, because the mean of its divisors is an integer number (11014591).

Almost surely, 2^22029181 is an apocalyptic number.

It is an amenable number.

22029181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22029181 is an equidigital number, since it uses as much as digits as its factorization.

22029181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 22029181 is about 4693.5254340421. The cubic root of 22029181 is about 280.3277666784.

The spelling of 22029181 in words is "twenty-two million, twenty-nine thousand, one hundred eighty-one".