213130818 has 32 divisors (see below), whose sum is σ = 474120000. Its totient is φ = 70969248.

The previous prime is 213130817. The next prime is 213130849. The reversal of 213130818 is 818031312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 213130791 and 213130800.

It is not an unprimeable number, because it can be changed into a prime (213130817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79630 + ... + 82262.

It is an arithmetic number, because the mean of its divisors is an integer number (14816250).

Almost surely, 2^213130818 is an apocalyptic number.

213130818 is an abundant number, since it is smaller than the sum of its proper divisors (260989182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213130818 is a wasteful number, since it uses less digits than its factorization.

213130818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 213130818 is about 14599.0005822316. Note that the first 3 decimals coincide. The cubic root of 213130818 is about 597.3314994358.

The spelling of 213130818 in words is "two hundred thirteen million, one hundred thirty thousand, eight hundred eighteen".