213031323 has 8 divisors (see below), whose sum is σ = 315602000. Its totient is φ = 142020864.

The previous prime is 213031309. The next prime is 213031333. The reversal of 213031323 is 323130312.

It is not a de Polignac number, because 213031323 - 2¹³ = 213023131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213031296 and 213031305.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3944998 + ... + 3945051.

It is an arithmetic number, because the mean of its divisors is an integer number (39450250).

Almost surely, 2^213031323 is an apocalyptic number.

213031323 is a deficient number, since it is larger than the sum of its proper divisors (102570677).

213031323 is an equidigital number, since it uses as much as digits as its factorization.

213031323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7890058 (or 7890052 counting only the distinct ones).

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

The square root of 213031323 is about 14595.5925881754. The cubic root of 213031323 is about 597.2385350168.

Adding to 213031323 its reverse (323130312), we get a palindrome (536161635).

The spelling of 213031323 in words is "two hundred thirteen million, thirty-one thousand, three hundred twenty-three".