213284399 has 4 divisors (see below), whose sum is σ = 213344040. Its totient is φ = 213224760.

The previous prime is 213284377. The next prime is 213284441. The reversal of 213284399 is 993482312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213284399 - 2⁸ = 213284143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213284699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24089 + ... + 31730.

It is an arithmetic number, because the mean of its divisors is an integer number (53336010).

Almost surely, 2^213284399 is an apocalyptic number.

213284399 is a deficient number, since it is larger than the sum of its proper divisors (59641).

213284399 is an equidigital number, since it uses as much as digits as its factorization.

213284399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59640.

The product of its digits is 93312, while the sum is 41.

The square root of 213284399 is about 14604.2596183442. The cubic root of 213284399 is about 597.4749430153.

The spelling of 213284399 in words is "two hundred thirteen million, two hundred eighty-four thousand, three hundred ninety-nine".