8171021340 has 48 divisors (see below), whose sum is σ = 25420956960. Its totient is φ = 2178938880.

The previous prime is 8171021329. The next prime is 8171021347. The reversal of 8171021340 is 431201718.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8171021347) 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 15 ways as a sum of consecutive naturals, for example, 7565221 + ... + 7566300.

It is an arithmetic number, because the mean of its divisors is an integer number (529603270).

Almost surely, 2^8171021340 is an apocalyptic number.

It is an amenable number.

8171021340 is an abundant number, since it is smaller than the sum of its proper divisors (17249935620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8171021340 is a wasteful number, since it uses less digits than its factorization.

8171021340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15131539 (or 15131531 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 8171021340 is about 90393.7018823767. The cubic root of 8171021340 is about 2014.1514109510.

The spelling of 8171021340 in words is "eight billion, one hundred seventy-one million, twenty-one thousand, three hundred forty".