7215156 has 72 divisors (see below), whose sum is σ = 20404384. Its totient is φ = 2216160.

The previous prime is 7215133. The next prime is 7215167. The reversal of 7215156 is 6515127.

It is a super-2 number, since 2×7215156² = 104116952208672, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12351 + ... + 12921.

Almost surely, 2^7215156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7215156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10202192).

7215156 is an abundant number, since it is smaller than the sum of its proper divisors (13189228).

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

7215156 is a wasteful number, since it uses less digits than its factorization.

7215156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 589 counting only the distinct ones).

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

The square root of 7215156 is about 2686.1042422065. The cubic root of 7215156 is about 193.2332723067.

The spelling of 7215156 in words is "seven million, two hundred fifteen thousand, one hundred fifty-six".