213430311 has 12 divisors (see below), whose sum is σ = 314105688. Its totient is φ = 139601904.

The previous prime is 213430279. The next prime is 213430333. The reversal of 213430311 is 113034312.

It is not a de Polignac number, because 213430311 - 2⁵ = 213430279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213430411) 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 11 ways as a sum of consecutive naturals, for example, 223245 + ... + 224198.

It is an arithmetic number, because the mean of its divisors is an integer number (26175474).

Almost surely, 2^213430311 is an apocalyptic number.

213430311 is a deficient number, since it is larger than the sum of its proper divisors (100675377).

213430311 is a wasteful number, since it uses less digits than its factorization.

213430311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447502 (or 447499 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 213430311 is about 14609.2542930842. The cubic root of 213430311 is about 597.6111600283.

Adding to 213430311 its reverse (113034312), we get a palindrome (326464623).

The spelling of 213430311 in words is "two hundred thirteen million, four hundred thirty thousand, three hundred eleven".