7218982427 has 4 divisors (see below), whose sum is σ = 7219181160. Its totient is φ = 7218783696.

The previous prime is 7218982411. The next prime is 7218982429. The reversal of 7218982427 is 7242898127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7218982427 - 2⁴ = 7218982411 is a prime.

It is a super-3 number, since 3×7218982427³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7218982429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27602 + ... + 123287.

It is an arithmetic number, because the mean of its divisors is an integer number (1804795290).

Almost surely, 2^7218982427 is an apocalyptic number.

7218982427 is a deficient number, since it is larger than the sum of its proper divisors (198733).

7218982427 is a wasteful number, since it uses less digits than its factorization.

7218982427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198732.

The product of its digits is 903168, while the sum is 50.

The square root of 7218982427 is about 84964.5951382104. The cubic root of 7218982427 is about 1932.6742552259.

The spelling of 7218982427 in words is "seven billion, two hundred eighteen million, nine hundred eighty-two thousand, four hundred twenty-seven".