222815 has 4 divisors (see below), whose sum is σ = 267384. Its totient is φ = 178248.

The previous prime is 222799. The next prime is 222823. The reversal of 222815 is 518222.

222815 is nontrivially palindromic in base 14.

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

It is a cyclic number.

It is not a de Polignac number, because 222815 - 2⁴ = 222799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22277 + ... + 22286.

It is an arithmetic number, because the mean of its divisors is an integer number (66846).

2²²²⁸¹⁵ is an apocalyptic number.

222815 is a deficient number, since it is larger than the sum of its proper divisors (44569).

222815 is an equidigital number, since it uses as much as digits as its factorization.

222815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44568.

The product of its digits is 320, while the sum is 20.

The square root of 222815 is about 472.0328378408. The cubic root of 222815 is about 60.6244960457.

The spelling of 222815 in words is "two hundred twenty-two thousand, eight hundred fifteen".