7216213536 has 504 divisors, whose sum is σ = 25433760240. Its totient is φ = 2007887616.

The previous prime is 7216213531. The next prime is 7216213577. The reversal of 7216213536 is 6353126127.

7216213536 is a `hidden beast` number, since 7 + 21 + 621 + 3 + 5 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 7216213536.

It is not an unprimeable number, because it can be changed into a prime (7216213531) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 67441195 + ... + 67441301.

It is an arithmetic number, because the mean of its divisors is an integer number (50463810).

Almost surely, 2^7216213536 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 7216213536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12716880120).

7216213536 is an abundant number, since it is smaller than the sum of its proper divisors (18217546704).

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

7216213536 is a wasteful number, since it uses less digits than its factorization.

7216213536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 178 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 7216213536 is about 84948.2991942746. The cubic root of 7216213536 is about 1932.4271267358.

The spelling of 7216213536 in words is "seven billion, two hundred sixteen million, two hundred thirteen thousand, five hundred thirty-six".