2143312621 has 4 divisors (see below), whose sum is σ = 2269389852. Its totient is φ = 2017235392.

The previous prime is 2143312609. The next prime is 2143312637. The reversal of 2143312621 is 1262133412.

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 2000772900 + 142539721 = 44730^2 + 11939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143312621 - 2¹¹ = 2143310573 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 (2143312681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63038590 + ... + 63038623.

It is an arithmetic number, because the mean of its divisors is an integer number (567347463).

Almost surely, 2^2143312621 is an apocalyptic number.

It is an amenable number.

2143312621 is a deficient number, since it is larger than the sum of its proper divisors (126077231).

2143312621 is a wasteful number, since it uses less digits than its factorization.

2143312621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126077230.

The product of its digits is 1728, while the sum is 25.

The square root of 2143312621 is about 46295.9244534549. The cubic root of 2143312621 is about 1289.3233277835.

The spelling of 2143312621 in words is "two billion, one hundred forty-three million, three hundred twelve thousand, six hundred twenty-one".