213130311 has 4 divisors (see below), whose sum is σ = 284173752. Its totient is φ = 142086872.

The previous prime is 213130303. The next prime is 213130327. The reversal of 213130311 is 113031312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213130311 - 2³ = 213130303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213130111) 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 3 ways as a sum of consecutive naturals, for example, 35521716 + ... + 35521721.

It is an arithmetic number, because the mean of its divisors is an integer number (71043438).

Almost surely, 2^213130311 is an apocalyptic number.

213130311 is a deficient number, since it is larger than the sum of its proper divisors (71043441).

213130311 is an equidigital number, since it uses as much as digits as its factorization.

213130311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71043440.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 213130311 is about 14598.9832180190. The cubic root of 213130311 is about 597.3310257872.

Adding to 213130311 its reverse (113031312), we get a palindrome (326161623).

The spelling of 213130311 in words is "two hundred thirteen million, one hundred thirty thousand, three hundred eleven".