213312303 has 24 divisors (see below), whose sum is σ = 316351776. Its totient is φ = 138456000.

The previous prime is 213312283. The next prime is 213312361. The reversal of 213312303 is 303213312.

It is a de Polignac number, because none of the positive numbers 2^k-213312303 is a prime.

It is a super-2 number, since 2×213312303² = 91004277222327618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213312383) 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 23 ways as a sum of consecutive naturals, for example, 53526 + ... + 57372.

It is an arithmetic number, because the mean of its divisors is an integer number (13181324).

Almost surely, 2^213312303 is an apocalyptic number.

213312303 is a deficient number, since it is larger than the sum of its proper divisors (103039473).

213312303 is a wasteful number, since it uses less digits than its factorization.

213312303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015 (or 4012 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 213312303 is about 14605.2149248137. The cubic root of 213312303 is about 597.5009977633.

Adding to 213312303 its reverse (303213312), we get a palindrome (516525615).

The spelling of 213312303 in words is "two hundred thirteen million, three hundred twelve thousand, three hundred three".