7211312018 has 8 divisors (see below), whose sum is σ = 10895924412. Its totient is φ = 3579337216.

The previous prime is 7211312011. The next prime is 7211312047. The reversal of 7211312018 is 8102131127.

It can be written as a sum of positive squares in 2 ways, for example, as 7119478129 + 91833889 = 84377^2 + 9583^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7211312011) 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 3 ways as a sum of consecutive naturals, for example, 13159055 + ... + 13159602.

Almost surely, 2^7211312018 is an apocalyptic number.

7211312018 is a deficient number, since it is larger than the sum of its proper divisors (3684612394).

7211312018 is a wasteful number, since it uses less digits than its factorization.

7211312018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26318796.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 7211312018 is about 84919.4442869241. Note that the first 3 decimals coincide. The cubic root of 7211312018 is about 1931.9895024127.

The spelling of 7211312018 in words is "seven billion, two hundred eleven million, three hundred twelve thousand, eighteen".