2217813 has 32 divisors (see below), whose sum is σ = 3480960. Its totient is φ = 1244160.

The previous prime is 2217799. The next prime is 2217829. The reversal of 2217813 is 3187122.

It is not a de Polignac number, because 2217813 - 2⁶ = 2217749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30345 + ... + 30417.

It is an arithmetic number, because the mean of its divisors is an integer number (108780).

2^2217813 is an apocalyptic number.

It is an amenable number.

2217813 is a deficient number, since it is larger than the sum of its proper divisors (1263147).

2217813 is a wasteful number, since it uses less digits than its factorization.

2217813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its digits is 672, while the sum is 24.

The square root of 2217813 is about 1489.2323525897. The cubic root of 2217813 is about 130.4092232865.

The spelling of 2217813 in words is "two million, two hundred seventeen thousand, eight hundred thirteen".