7215516 has 144 divisors (see below), whose sum is σ = 24111360. Its totient is φ = 1762560.

The previous prime is 7215503. The next prime is 7215547. The reversal of 7215516 is 6155127.

It is a super-2 number, since 2×7215516² = 104127342292512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7215516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52600 + ... + 52736.

It is an arithmetic number, because the mean of its divisors is an integer number (167440).

Almost surely, 2^7215516 is an apocalyptic number.

7215516 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7215516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12055680).

7215516 is an abundant number, since it is smaller than the sum of its proper divisors (16895844).

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

7215516 is a wasteful number, since it uses less digits than its factorization.

7215516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 179 counting only the distinct ones).

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

The square root of 7215516 is about 2686.1712529174. The cubic root of 7215516 is about 193.2364860428.

The spelling of 7215516 in words is "seven million, two hundred fifteen thousand, five hundred sixteen".