7215422500 has 120 divisors (see below), whose sum is σ = 18538115904. Its totient is φ = 2421840000.

The previous prime is 7215422497. The next prime is 7215422509. The reversal of 7215422500 is 52245127.

It is not an unprimeable number, because it can be changed into a prime (7215422509) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 347409 + ... + 367591.

Almost surely, 2^7215422500 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 7215422500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9269057952).

7215422500 is an abundant number, since it is smaller than the sum of its proper divisors (11322693404).

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

7215422500 is a wasteful number, since it uses less digits than its factorization.

7215422500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20231 (or 20214 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 7215422500 is about 84943.6430817516. The cubic root of 7215422500 is about 1932.3565137440.

Adding to 7215422500 its reverse (52245127), we get a palindrome (7267667627).

The spelling of 7215422500 in words is "seven billion, two hundred fifteen million, four hundred twenty-two thousand, five hundred".