213113818 has 12 divisors (see below), whose sum is σ = 327662910. Its totient is φ = 103956320.

The previous prime is 213113783. The next prime is 213113851. The reversal of 213113818 is 818311312.

213113818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 104182849 + 108930969 = 10207^2 + 10437^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28333 + ... + 35056.

Almost surely, 2^213113818 is an apocalyptic number.

213113818 is a deficient number, since it is larger than the sum of its proper divisors (114549092).

213113818 is an equidigital number, since it uses as much as digits as its factorization.

213113818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63473 (or 63432 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 213113818 is about 14598.4183389845. The cubic root of 213113818 is about 597.3156173192.

The spelling of 213113818 in words is "two hundred thirteen million, one hundred thirteen thousand, eight hundred eighteen".