8343020581 has 8 divisors (see below), whose sum is σ = 9535437824. Its totient is φ = 7150742640.

The previous prime is 8343020573. The next prime is 8343020603. The reversal of 8343020581 is 1850203438.

It is a happy number.

8343020581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8343020581 - 2³ = 8343020573 is a prime.

It is a super-2 number, since 2×8343020581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8343020561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192211 + ... + 231583.

It is an arithmetic number, because the mean of its divisors is an integer number (1191929728).

Almost surely, 2^8343020581 is an apocalyptic number.

It is an amenable number.

8343020581 is a deficient number, since it is larger than the sum of its proper divisors (1192417243).

8343020581 is a wasteful number, since it uses less digits than its factorization.

8343020581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69651.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 8343020581 is about 91340.1367472154. The cubic root of 8343020581 is about 2028.1859582711.

The spelling of 8343020581 in words is "eight billion, three hundred forty-three million, twenty thousand, five hundred eighty-one".