612021218 has 8 divisors (see below), whose sum is σ = 942843612. Its totient is φ = 297740016.

The previous prime is 612021203. The next prime is 612021253. The reversal of 612021218 is 812120216.

It can be written as a sum of positive squares in 2 ways, for example, as 596678329 + 15342889 = 24427^2 + 3917^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 612021193 and 612021202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4135205 + ... + 4135352.

Almost surely, 2^612021218 is an apocalyptic number.

612021218 is a deficient number, since it is larger than the sum of its proper divisors (330822394).

612021218 is a wasteful number, since it uses less digits than its factorization.

612021218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8270596.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 612021218 is about 24739.0625933967. The cubic root of 612021218 is about 849.0282865692.

The spelling of 612021218 in words is "six hundred twelve million, twenty-one thousand, two hundred eighteen".