218484612722 has 4 divisors (see below), whose sum is σ = 327726919086. Its totient is φ = 109242306360.

The previous prime is 218484612719. The next prime is 218484612733. The reversal of 218484612722 is 227216484812.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 218379570721 + 105042001 = 467311^2 + 10249^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54621153179 + ... + 54621153182.

Almost surely, 2^218484612722 is an apocalyptic number.

218484612722 is a deficient number, since it is larger than the sum of its proper divisors (109242306364).

218484612722 is a wasteful number, since it uses less digits than its factorization.

218484612722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109242306363.

The product of its digits is 688128, while the sum is 47.

The spelling of 218484612722 in words is "two hundred eighteen billion, four hundred eighty-four million, six hundred twelve thousand, seven hundred twenty-two".