8260031721 has 4 divisors (see below), whose sum is σ = 11013375632. Its totient is φ = 5506687812.

The previous prime is 8260031713. The next prime is 8260031761. The reversal of 8260031721 is 1271300628.

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 not a de Polignac number, because 8260031721 - 2³ = 8260031713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8260031711) 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, 1376671951 + ... + 1376671956.

It is an arithmetic number, because the mean of its divisors is an integer number (2753343908).

Almost surely, 2^8260031721 is an apocalyptic number.

It is an amenable number.

8260031721 is a deficient number, since it is larger than the sum of its proper divisors (2753343911).

8260031721 is a wasteful number, since it uses less digits than its factorization.

8260031721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753343910.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 8260031721 is about 90884.7166524713. The cubic root of 8260031721 is about 2021.4386804419.

The spelling of 8260031721 in words is "eight billion, two hundred sixty million, thirty-one thousand, seven hundred twenty-one".