7155222 has 16 divisors (see below), whose sum is σ = 14342832. Its totient is φ = 2379680.

The previous prime is 7155217. The next prime is 7155271. The reversal of 7155222 is 2225517.

It is a junction number, because it is equal to n+sod(n) for n = 7155192 and 7155201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2272 + ... + 4412.

It is an arithmetic number, because the mean of its divisors is an integer number (896427).

Almost surely, 2^7155222 is an apocalyptic number.

7155222 is an abundant number, since it is smaller than the sum of its proper divisors (7187610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7155222 is a wasteful number, since it uses less digits than its factorization.

7155222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703.

The product of its digits is 1400, while the sum is 24.

The square root of 7155222 is about 2674.9246718366. The cubic root of 7155222 is about 192.6967415659.

The spelling of 7155222 in words is "seven million, one hundred fifty-five thousand, two hundred twenty-two".