7216555215 has 16 divisors (see below), whose sum is σ = 11552588928. Its totient is φ = 3846795936.

The previous prime is 7216555211. The next prime is 7216555217. The reversal of 7216555215 is 5125556127.

It is not a de Polignac number, because 7216555215 - 2² = 7216555211 is a prime.

It is a super-2 number, since 2×7216555215² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216555211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97537 + ... + 154746.

It is an arithmetic number, because the mean of its divisors is an integer number (722036808).

Almost surely, 2^7216555215 is an apocalyptic number.

7216555215 is a deficient number, since it is larger than the sum of its proper divisors (4336033713).

7216555215 is a wasteful number, since it uses less digits than its factorization.

7216555215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254198.

The product of its digits is 105000, while the sum is 39.

The square root of 7216555215 is about 84950.3102701809. The cubic root of 7216555215 is about 1932.4576256184.

The spelling of 7216555215 in words is "seven billion, two hundred sixteen million, five hundred fifty-five thousand, two hundred fifteen".