1818213 has 8 divisors (see below), whose sum is σ = 2508000. Its totient is φ = 1170288.

The previous prime is 1818209. The next prime is 1818221. The reversal of 1818213 is 3128181.

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

It is not a de Polignac number, because 1818213 - 2² = 1818209 is a prime.

It is a Curzon number.

1818213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10363 + ... + 10536.

It is an arithmetic number, because the mean of its divisors is an integer number (313500).

2^1818213 is an apocalyptic number.

It is an amenable number.

1818213 is a deficient number, since it is larger than the sum of its proper divisors (689787).

1818213 is a wasteful number, since it uses less digits than its factorization.

1818213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20931.

The product of its digits is 384, while the sum is 24.

The square root of 1818213 is about 1348.4112874046. The cubic root of 1818213 is about 122.0529421750.

The spelling of 1818213 in words is "one million, eight hundred eighteen thousand, two hundred thirteen".