2311248133 has 4 divisors (see below), whose sum is σ = 2311945740. Its totient is φ = 2310550528.

The previous prime is 2311248131. The next prime is 2311248143. The reversal of 2311248133 is 3318421132.

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 508141764 + 1803106369 = 22542^2 + 42463^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311248133 - 2¹ = 2311248131 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 (2311248131) 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, 343810 + ... + 350467.

It is an arithmetic number, because the mean of its divisors is an integer number (577986435).

Almost surely, 2^2311248133 is an apocalyptic number.

It is an amenable number.

2311248133 is a deficient number, since it is larger than the sum of its proper divisors (697607).

2311248133 is an equidigital number, since it uses as much as digits as its factorization.

2311248133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697606.

The product of its digits is 3456, while the sum is 28.

The square root of 2311248133 is about 48075.4420988513. The cubic root of 2311248133 is about 1322.1544501920.

Adding to 2311248133 its reverse (3318421132), we get a palindrome (5629669265).

The spelling of 2311248133 in words is "two billion, three hundred eleven million, two hundred forty-eight thousand, one hundred thirty-three".