22661189 has 6 divisors (see below), whose sum is σ = 22813830. Its totient is φ = 22509480.

The previous prime is 22661173. The next prime is 22661201. The reversal of 22661189 is 98116622.

It can be written as a sum of positive squares in only one way, i.e., 21548164 + 1113025 = 4642^2 + 1055^2 .

It is not a de Polignac number, because 22661189 - 2⁴ = 22661173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22661389) 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 in 5 ways as a sum of consecutive naturals, for example, 44267 + ... + 44775.

It is an arithmetic number, because the mean of its divisors is an integer number (3802305).

Almost surely, 2^22661189 is an apocalyptic number.

It is an amenable number.

22661189 is a deficient number, since it is larger than the sum of its proper divisors (152641).

22661189 is an frugal number, since it uses more digits than its factorization.

22661189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 720 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 22661189 is about 4760.3769808703. The cubic root of 22661189 is about 282.9833592000.

The spelling of 22661189 in words is "twenty-two million, six hundred sixty-one thousand, one hundred eighty-nine".