213221299 has 4 divisors (see below), whose sum is σ = 213252264. Its totient is φ = 213190336.

The previous prime is 213221251. The next prime is 213221377. The reversal of 213221299 is 992122312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213221299 - 2⁷ = 213221171 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 213221299.

It is not an unprimeable number, because it can be changed into a prime (213221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24 + ... + 20650.

It is an arithmetic number, because the mean of its divisors is an integer number (53313066).

Almost surely, 2^213221299 is an apocalyptic number.

213221299 is a deficient number, since it is larger than the sum of its proper divisors (30965).

213221299 is a wasteful number, since it uses less digits than its factorization.

213221299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30964.

The product of its digits is 3888, while the sum is 31.

The square root of 213221299 is about 14602.0991299196. The cubic root of 213221299 is about 597.4160163934.

The spelling of 213221299 in words is "two hundred thirteen million, two hundred twenty-one thousand, two hundred ninety-nine".