213131033 has 4 divisors (see below), whose sum is σ = 213220788. Its totient is φ = 213041280.

The previous prime is 213131027. The next prime is 213131047. The reversal of 213131033 is 330131312.

213131033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15784729 + 197346304 = 3973^2 + 14048^2 .

It is a cyclic number.

It is not a de Polignac number, because 213131033 - 2²⁶ = 146022169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213131003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41216 + ... + 46097.

It is an arithmetic number, because the mean of its divisors is an integer number (53305197).

Almost surely, 2^213131033 is an apocalyptic number.

It is an amenable number.

213131033 is a deficient number, since it is larger than the sum of its proper divisors (89755).

213131033 is an equidigital number, since it uses as much as digits as its factorization.

213131033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89754.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 213131033 is about 14599.0079457475. The cubic root of 213131033 is about 597.3317002924.

Adding to 213131033 its reverse (330131312), we get a palindrome (543262345).

The spelling of 213131033 in words is "two hundred thirteen million, one hundred thirty-one thousand, thirty-three".