8171022240 has 144 divisors (see below), whose sum is σ = 27955804968. Its totient is φ = 2173298688.

The previous prime is 8171022229. The next prime is 8171022247. The reversal of 8171022240 is 422201718.

It can be written as a sum of positive squares in 4 ways, for example, as 4456363536 + 3714658704 = 66756^2 + 60948^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (8171022247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564534 + ... + 578826.

Almost surely, 2^8171022240 is an apocalyptic number.

8171022240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8171022240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13977902484).

8171022240 is an abundant number, since it is smaller than the sum of its proper divisors (19784782728).

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

8171022240 is a wasteful number, since it uses less digits than its factorization.

8171022240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14711 (or 14700 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 8171022240 is about 90393.7068605995. The cubic root of 8171022240 is about 2014.1514849009.

Adding to 8171022240 its reverse (422201718), we get a palindrome (8593223958).

The spelling of 8171022240 in words is "eight billion, one hundred seventy-one million, twenty-two thousand, two hundred forty".