222620581 has 4 divisors (see below), whose sum is σ = 225670252. Its totient is φ = 219570912.

The previous prime is 222620569. The next prime is 222620597. The reversal of 222620581 is 185026222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118069956 + 104550625 = 10866^2 + 10225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222620581 is a prime.

It is a super-2 number, since 2×222620581² = 99119846169555122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220620581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1524726 + ... + 1524871.

It is an arithmetic number, because the mean of its divisors is an integer number (56417563).

Almost surely, 2^222620581 is an apocalyptic number.

It is an amenable number.

222620581 is a deficient number, since it is larger than the sum of its proper divisors (3049671).

222620581 is an equidigital number, since it uses as much as digits as its factorization.

222620581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049670.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 222620581 is about 14920.4752270161. The cubic root of 222620581 is about 606.0685811930.

The spelling of 222620581 in words is "two hundred twenty-two million, six hundred twenty thousand, five hundred eighty-one".