2133354521 has 4 divisors (see below), whose sum is σ = 2206918500. Its totient is φ = 2059790544.

The previous prime is 2133354511. The next prime is 2133354527. The reversal of 2133354521 is 1254533312.

It is a happy number.

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 1330425625 + 802928896 = 36475^2 + 28336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2133354521 is a prime.

It is a super-2 number, since 2×2133354521² = 9102403024542278882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 73563949 = 2133354521 / (2 + 1 + 3 + 3 + 3 + 5 + 4 + 5 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2133354527) 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, 36781946 + ... + 36782003.

It is an arithmetic number, because the mean of its divisors is an integer number (551729625).

Almost surely, 2^2133354521 is an apocalyptic number.

It is an amenable number.

2133354521 is a deficient number, since it is larger than the sum of its proper divisors (73563979).

2133354521 is an equidigital number, since it uses as much as digits as its factorization.

2133354521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73563978.

The product of its digits is 10800, while the sum is 29.

The square root of 2133354521 is about 46188.2508978203. The cubic root of 2133354521 is about 1287.3234412241.

Adding to 2133354521 its reverse (1254533312), we get a palindrome (3387887833).

The spelling of 2133354521 in words is "two billion, one hundred thirty-three million, three hundred fifty-four thousand, five hundred twenty-one".