2133452645 has 4 divisors (see below), whose sum is σ = 2560143180. Its totient is φ = 1706762112.

The previous prime is 2133452641. The next prime is 2133452647. The reversal of 2133452645 is 5462543312.

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 1686087844 + 447364801 = 41062^2 + 21151^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133452645 - 2² = 2133452641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133452641) 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, 213345260 + ... + 213345269.

It is an arithmetic number, because the mean of its divisors is an integer number (640035795).

Almost surely, 2^2133452645 is an apocalyptic number.

It is an amenable number.

2133452645 is a deficient number, since it is larger than the sum of its proper divisors (426690535).

2133452645 is an equidigital number, since it uses as much as digits as its factorization.

2133452645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426690534.

The product of its digits is 86400, while the sum is 35.

The square root of 2133452645 is about 46189.3131037906. The cubic root of 2133452645 is about 1287.3431778075.

Adding to 2133452645 its reverse (5462543312), we get a palindrome (7595995957).

The spelling of 2133452645 in words is "two billion, one hundred thirty-three million, four hundred fifty-two thousand, six hundred forty-five".