7211916 has 30 divisors (see below), whose sum is σ = 18854220. Its totient is φ = 2403864.

The previous prime is 7211909. The next prime is 7211921. The reversal of 7211916 is 6191127.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 7211916.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10806 + ... + 11453.

It is an arithmetic number, because the mean of its divisors is an integer number (628474).

Almost surely, 2^7211916 is an apocalyptic number.

It is an amenable number.

7211916 is an abundant number, since it is smaller than the sum of its proper divisors (11642304).

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

7211916 is a wasteful number, since it uses less digits than its factorization.

7211916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22275 (or 22264 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 7211916 is about 2685.5010705639. The cubic root of 7211916 is about 193.2043438705.

The spelling of 7211916 in words is "seven million, two hundred eleven thousand, nine hundred sixteen".