213110131 has 4 divisors (see below), whose sum is σ = 229503232. Its totient is φ = 196717032.

The previous prime is 213110071. The next prime is 213110159. The reversal of 213110131 is 131011312.

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 213110131 - 2⁹ = 213109619 is a prime.

It is a super-2 number, since 2×213110131² = 90831855869674322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16393087 = 213110131 / (2 + 1 + 3 + 1 + 1 + 0 + 1 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213110171) 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 3 ways as a sum of consecutive naturals, for example, 8196531 + ... + 8196556.

It is an arithmetic number, because the mean of its divisors is an integer number (57375808).

Almost surely, 2^213110131 is an apocalyptic number.

213110131 is a deficient number, since it is larger than the sum of its proper divisors (16393101).

213110131 is a wasteful number, since it uses less digits than its factorization.

213110131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16393100.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 213110131 is about 14598.2920576347. The cubic root of 213110131 is about 597.3121726569.

Adding to 213110131 its reverse (131011312), we get a palindrome (344121443).

The spelling of 213110131 in words is "two hundred thirteen million, one hundred ten thousand, one hundred thirty-one".