7213521115 has 8 divisors (see below), whose sum is σ = 8857533168. Its totient is φ = 5636611680.

The previous prime is 7213521083. The next prime is 7213521121. The reversal of 7213521115 is 5111253127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7213521115 - 2⁵ = 7213521083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16775416 + ... + 16775845.

It is an arithmetic number, because the mean of its divisors is an integer number (1107191646).

Almost surely, 2^7213521115 is an apocalyptic number.

7213521115 is a deficient number, since it is larger than the sum of its proper divisors (1644012053).

7213521115 is a wasteful number, since it uses less digits than its factorization.

7213521115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33551309.

The product of its digits is 2100, while the sum is 28.

The square root of 7213521115 is about 84932.4503061109. The cubic root of 7213521115 is about 1932.1867627016.

The spelling of 7213521115 in words is "seven billion, two hundred thirteen million, five hundred twenty-one thousand, one hundred fifteen".