213111133 has 8 divisors (see below), whose sum is σ = 225774648. Its totient is φ = 200461824.

The previous prime is 213111131. The next prime is 213111149. The reversal of 213111133 is 331111312.

It can be written as a sum of positive squares in 4 ways, for example, as 58033924 + 155077209 = 7618^2 + 12453^2 .

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

It is not a de Polignac number, because 213111133 - 2¹ = 213111131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111131) 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, 56185 + ... + 59857.

It is an arithmetic number, because the mean of its divisors is an integer number (28221831).

Almost surely, 2^213111133 is an apocalyptic number.

It is an amenable number.

213111133 is a deficient number, since it is larger than the sum of its proper divisors (12663515).

213111133 is a wasteful number, since it uses less digits than its factorization.

213111133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7103.

The product of its digits is 54, while the sum is 16.

The square root of 213111133 is about 14598.3263766776. The cubic root of 213111133 is about 597.3131088018.

Adding to 213111133 its reverse (331111312), we get a palindrome (544222445).

The spelling of 213111133 in words is "two hundred thirteen million, one hundred eleven thousand, one hundred thirty-three".