7215725730 has 64 divisors (see below), whose sum is σ = 17543589120. Its totient is φ = 1899177984.

The previous prime is 7215725717. The next prime is 7215725731. The reversal of 7215725730 is 375275127.

It is not an unprimeable number, because it can be changed into a prime (7215725731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1725402 + ... + 1729578.

It is an arithmetic number, because the mean of its divisors is an integer number (274118580).

Almost surely, 2^7215725730 is an apocalyptic number.

7215725730 is an abundant number, since it is smaller than the sum of its proper divisors (10327863390).

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

7215725730 is a wasteful number, since it uses less digits than its factorization.

7215725730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923.

The product of its (nonzero) digits is 102900, while the sum is 39.

The square root of 7215725730 is about 84945.4279523036. The cubic root of 7215725730 is about 1932.3835826258.

The spelling of 7215725730 in words is "seven billion, two hundred fifteen million, seven hundred twenty-five thousand, seven hundred thirty".