7218982426 has 4 divisors (see below), whose sum is σ = 10828473642. Its totient is φ = 3609491212.

The previous prime is 7218982411. The next prime is 7218982429. The reversal of 7218982426 is 6242898127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6242898127 = 563 ⋅11088629.

It can be written as a sum of positive squares in only one way, i.e., 5400045225 + 1818937201 = 73485^2 + 42649^2 .

It is a super-2 number, since 2×7218982426² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7218982426.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804745605 + ... + 1804745608.

Almost surely, 2^7218982426 is an apocalyptic number.

7218982426 is a deficient number, since it is larger than the sum of its proper divisors (3609491216).

7218982426 is a wasteful number, since it uses less digits than its factorization.

7218982426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609491215.

The product of its digits is 774144, while the sum is 49.

The square root of 7218982426 is about 84964.5951323256. The cubic root of 7218982426 is about 1932.6742551367.

The spelling of 7218982426 in words is "seven billion, two hundred eighteen million, nine hundred eighty-two thousand, four hundred twenty-six".