7855222 has 4 divisors (see below), whose sum is σ = 11782836. Its totient is φ = 3927610.

The previous prime is 7855217. The next prime is 7855223. The reversal of 7855222 is 2225587.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7855223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1963804 + ... + 1963807.

It is an arithmetic number, because the mean of its divisors is an integer number (2945709).

Almost surely, 2^7855222 is an apocalyptic number.

7855222 is a deficient number, since it is larger than the sum of its proper divisors (3927614).

7855222 is a wasteful number, since it uses less digits than its factorization.

7855222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927613.

The product of its digits is 11200, while the sum is 31.

The square root of 7855222 is about 2802.7168961563. The cubic root of 7855222 is about 198.7861645885.

The spelling of 7855222 in words is "seven million, eight hundred fifty-five thousand, two hundred twenty-two".