7271999855 has 16 divisors (see below), whose sum is σ = 8812346400. Its totient is φ = 5760374400.

The previous prime is 7271999831. The next prime is 7271999857. The reversal of 7271999855 is 5589991727.

It is not a de Polignac number, because 7271999855 - 2¹⁴ = 7271983471 is a prime.

It is a super-2 number, since 2×7271999855² (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 (7271999857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1032536 + ... + 1039554.

It is an arithmetic number, because the mean of its divisors is an integer number (550771650).

Almost surely, 2^7271999855 is an apocalyptic number.

7271999855 is a deficient number, since it is larger than the sum of its proper divisors (1540346545).

7271999855 is a wasteful number, since it uses less digits than its factorization.

7271999855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9034.

The product of its digits is 14288400, while the sum is 62.

The square root of 7271999855 is about 85276.0215711310. The cubic root of 7271999855 is about 1937.3940153194.

The spelling of 7271999855 in words is "seven billion, two hundred seventy-one million, nine hundred ninety-nine thousand, eight hundred fifty-five".