222001331 has 4 divisors (see below), whose sum is σ = 222786072. Its totient is φ = 221216592.

The previous prime is 222001319. The next prime is 222001337. The reversal of 222001331 is 133100222.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222001331 is a prime.

It is a super-2 number, since 2×222001331² = 98569181931543122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222001337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391946 + ... + 392511.

It is an arithmetic number, because the mean of its divisors is an integer number (55696518).

Almost surely, 2^222001331 is an apocalyptic number.

222001331 is a deficient number, since it is larger than the sum of its proper divisors (784741).

222001331 is an equidigital number, since it uses as much as digits as its factorization.

222001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784740.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 222001331 is about 14899.7090911199. The cubic root of 222001331 is about 605.5061047493.

Adding to 222001331 its reverse (133100222), we get a palindrome (355101553).

The spelling of 222001331 in words is "two hundred twenty-two million, one thousand, three hundred thirty-one".