213313331 has 32 divisors (see below), whose sum is σ = 284912640. Its totient is φ = 154598400.

The previous prime is 213313301. The next prime is 213313343. The reversal of 213313331 is 133313312.

It is not a de Polignac number, because 213313331 - 2⁶ = 213313267 is a prime.

It is a super-2 number, since 2×213313331² = 91005154364631122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213313301) 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 31 ways as a sum of consecutive naturals, for example, 115586 + ... + 117416.

It is an arithmetic number, because the mean of its divisors is an integer number (8903520).

Almost surely, 2^213313331 is an apocalyptic number.

213313331 is a deficient number, since it is larger than the sum of its proper divisors (71599309).

213313331 is a wasteful number, since it uses less digits than its factorization.

213313331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955.

The product of its digits is 486, while the sum is 20.

The square root of 213313331 is about 14605.2501176803. The cubic root of 213313331 is about 597.5019575924.

Adding to 213313331 its reverse (133313312), we get a palindrome (346626643).

The spelling of 213313331 in words is "two hundred thirteen million, three hundred thirteen thousand, three hundred thirty-one".