222785213 has 6 divisors (see below), whose sum is σ = 259158366. Its totient is φ = 190958712.

The previous prime is 222785207. The next prime is 222785219. The reversal of 222785213 is 312587222.

It is an interprime number because it is at equal distance from previous prime (222785207) and next prime (222785219).

It can be written as a sum of positive squares in only one way, i.e., 222516889 + 268324 = 14917^2 + 518^2 .

It is not a de Polignac number, because 222785213 - 2⁸ = 222784957 is a prime.

It is a super-2 number, since 2×222785213² = 99266502262910738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222785213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222785219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2273270 + ... + 2273367.

It is an arithmetic number, because the mean of its divisors is an integer number (43193061).

Almost surely, 2^222785213 is an apocalyptic number.

It is an amenable number.

222785213 is a deficient number, since it is larger than the sum of its proper divisors (36373153).

222785213 is an equidigital number, since it uses as much as digits as its factorization.

222785213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546651 (or 4546644 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 222785213 is about 14925.9911898674. The cubic root of 222785213 is about 606.2179439883.

The spelling of 222785213 in words is "two hundred twenty-two million, seven hundred eighty-five thousand, two hundred thirteen".