213288819 has 4 divisors (see below), whose sum is σ = 284385096. Its totient is φ = 142192544.

The previous prime is 213288809. The next prime is 213288833. The reversal of 213288819 is 918882312.

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 213288819 - 2⁸ = 213288563 is a prime.

It is a super-3 number, since 3×213288819³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (213288809) 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, 35548134 + ... + 35548139.

It is an arithmetic number, because the mean of its divisors is an integer number (71096274).

Almost surely, 2^213288819 is an apocalyptic number.

213288819 is a deficient number, since it is larger than the sum of its proper divisors (71096277).

213288819 is an equidigital number, since it uses as much as digits as its factorization.

213288819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71096276.

The product of its digits is 55296, while the sum is 42.

The square root of 213288819 is about 14604.4109432733. The cubic root of 213288819 is about 597.4790702448.

It can be divided in two parts, 2132 and 88819, that added together give a triangular number (90951 = T₄₂₆).

The spelling of 213288819 in words is "two hundred thirteen million, two hundred eighty-eight thousand, eight hundred nineteen".