22573181 has 2 divisors, whose sum is σ = 22573182. Its totient is φ = 22573180.

The previous prime is 22573147. The next prime is 22573241. The reversal of 22573181 is 18137522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22477081 + 96100 = 4741^2 + 310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22573181 is a prime.

It is a super-2 number, since 2×22573181² = 1019097000917522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22573781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11286590 + 11286591.

It is an arithmetic number, because the mean of its divisors is an integer number (11286591).

Almost surely, 2^22573181 is an apocalyptic number.

It is an amenable number.

22573181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22573181 is an equidigital number, since it uses as much as digits as its factorization.

22573181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 22573181 is about 4751.1241827593. The cubic root of 22573181 is about 282.6165483546.

The spelling of 22573181 in words is "twenty-two million, five hundred seventy-three thousand, one hundred eighty-one".