2213021209 has 4 divisors (see below), whose sum is σ = 2529167104. Its totient is φ = 1896875316.

The previous prime is 2213021203. The next prime is 2213021243. The reversal of 2213021209 is 9021203122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2213021209 - 2¹⁵ = 2212988441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2213021209.

It is not an unprimeable number, because it can be changed into a prime (2213021203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158072937 + ... + 158072950.

It is an arithmetic number, because the mean of its divisors is an integer number (632291776).

Almost surely, 2^2213021209 is an apocalyptic number.

It is an amenable number.

2213021209 is a deficient number, since it is larger than the sum of its proper divisors (316145895).

2213021209 is an equidigital number, since it uses as much as digits as its factorization.

2213021209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316145894.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2213021209 is about 47042.7593684724. The cubic root of 2213021209 is about 1303.1523515042.

The spelling of 2213021209 in words is "two billion, two hundred thirteen million, twenty-one thousand, two hundred nine".