7155216 has 50 divisors (see below), whose sum is σ = 20713022. Its totient is φ = 2384640.

The previous prime is 7155209. The next prime is 7155217. The reversal of 7155216 is 6125517.

It can be written as a sum of positive squares in only one way, i.e., 5475600 + 1679616 = 2340^2 + 1296^2 .

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 7155216.

It is not an unprimeable number, because it can be changed into a prime (7155217) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1465 + ... + 4056.

Almost surely, 2^7155216 is an apocalyptic number.

It is an amenable number.

7155216 is an abundant number, since it is smaller than the sum of its proper divisors (13557806).

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

7155216 is a wasteful number, since it uses less digits than its factorization.

7155216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541 (or 5526 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 7155216 is about 2674.9235503094. The cubic root of 7155216 is about 192.6966877040.

The spelling of 7155216 in words is "seven million, one hundred fifty-five thousand, two hundred sixteen".