243013133 has 6 divisors (see below), whose sum is σ = 267113742. Its totient is φ = 220920920.

The previous prime is 243013063. The next prime is 243013139. The reversal of 243013133 is 331310342.

243013133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 242954569 + 58564 = 15587^2 + 242^2 .

It is not a de Polignac number, because 243013133 - 2¹² = 243009037 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 (243013139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1004066 + ... + 1004307.

It is an arithmetic number, because the mean of its divisors is an integer number (44518957).

Almost surely, 2^243013133 is an apocalyptic number.

It is an amenable number.

243013133 is a deficient number, since it is larger than the sum of its proper divisors (24100609).

243013133 is a wasteful number, since it uses less digits than its factorization.

243013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008395 (or 2008384 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 243013133 is about 15588.8785035999. The cubic root of 243013133 is about 624.0363885817.

Adding to 243013133 its reverse (331310342), we get a palindrome (574323475).

The spelling of 243013133 in words is "two hundred forty-three million, thirteen thousand, one hundred thirty-three".