7221158 has 16 divisors (see below), whose sum is σ = 13107744. Its totient is φ = 2912640.

The previous prime is 7221157. The next prime is 7221161. The reversal of 7221158 is 8511227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221157) 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, 14933 + ... + 15408.

It is an arithmetic number, because the mean of its divisors is an integer number (819234).

Almost surely, 2^7221158 is an apocalyptic number.

7221158 is a deficient number, since it is larger than the sum of its proper divisors (5886586).

7221158 is a wasteful number, since it uses less digits than its factorization.

7221158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30367.

The product of its digits is 1120, while the sum is 26.

The square root of 7221158 is about 2687.2212413570. The cubic root of 7221158 is about 193.2868384692.

The spelling of 7221158 in words is "seven million, two hundred twenty-one thousand, one hundred fifty-eight".