213031313 has 8 divisors (see below), whose sum is σ = 242502336. Its totient is φ = 185244400.

The previous prime is 213031309. The next prime is 213031333. The reversal of 213031313 is 313130312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213031313 - 2² = 213031309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213031291 and 213031300.

It is not an unprimeable number, because it can be changed into a prime (213031333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420758 + ... + 421263.

It is an arithmetic number, because the mean of its divisors is an integer number (30312792).

Almost surely, 2^213031313 is an apocalyptic number.

213031313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

213031313 is a deficient number, since it is larger than the sum of its proper divisors (29471023).

213031313 is a wasteful number, since it uses less digits than its factorization.

213031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842055.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 213031313 is about 14595.5922456062. The cubic root of 213031313 is about 597.2385256717.

Adding to 213031313 its reverse (313130312), we get a palindrome (526161625).

The spelling of 213031313 in words is "two hundred thirteen million, thirty-one thousand, three hundred thirteen".