2133525221 has 4 divisors (see below), whose sum is σ = 2163574944. Its totient is φ = 2103475500.

The previous prime is 2133525217. The next prime is 2133525239. The reversal of 2133525221 is 1225253312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2133525221 - 2² = 2133525217 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 (2133524221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15024755 + ... + 15024896.

It is an arithmetic number, because the mean of its divisors is an integer number (540893736).

Almost surely, 2^2133525221 is an apocalyptic number.

It is an amenable number.

2133525221 is a deficient number, since it is larger than the sum of its proper divisors (30049723).

2133525221 is an equidigital number, since it uses as much as digits as its factorization.

2133525221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30049722.

The product of its digits is 3600, while the sum is 26.

The square root of 2133525221 is about 46190.0987333866. The cubic root of 2133525221 is about 1287.3577752972.

Adding to 2133525221 its reverse (1225253312), we get a palindrome (3358778533).

The spelling of 2133525221 in words is "two billion, one hundred thirty-three million, five hundred twenty-five thousand, two hundred twenty-one".