222185681 has 8 divisors (see below), whose sum is σ = 235776960. Its totient is φ = 208922032.

The previous prime is 222185669. The next prime is 222185693. The reversal of 222185681 is 186581222.

It is a happy number.

222185681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (222185669) and next prime (222185693).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222185681 is a prime.

It is a super-2 number, since 2×222185681² = 98732953682867522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222185081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80510 + ... + 83223.

It is an arithmetic number, because the mean of its divisors is an integer number (29472120).

Almost surely, 2^222185681 is an apocalyptic number.

It is an amenable number.

222185681 is a deficient number, since it is larger than the sum of its proper divisors (13591279).

222185681 is a wasteful number, since it uses less digits than its factorization.

222185681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163815.

The product of its digits is 15360, while the sum is 35.

The square root of 222185681 is about 14905.8941697571. The cubic root of 222185681 is about 605.6736625538.

The spelling of 222185681 in words is "two hundred twenty-two million, one hundred eighty-five thousand, six hundred eighty-one".