8381172481 has 8 divisors (see below), whose sum is σ = 9366100128. Its totient is φ = 7433412000.

The previous prime is 8381172473. The next prime is 8381172487. The reversal of 8381172481 is 1842711838.

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 8381172481 - 2³ = 8381172473 is a prime.

It is a super-2 number, since 2×8381172481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8381172487) 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, 9291315 + ... + 9292216.

It is an arithmetic number, because the mean of its divisors is an integer number (1170762516).

Almost surely, 2^8381172481 is an apocalyptic number.

It is an amenable number.

8381172481 is a deficient number, since it is larger than the sum of its proper divisors (984927647).

8381172481 is a wasteful number, since it uses less digits than its factorization.

8381172481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18583583.

The product of its digits is 86016, while the sum is 43.

The square root of 8381172481 is about 91548.7437434288. The cubic root of 8381172481 is about 2031.2728297666.

The spelling of 8381172481 in words is "eight billion, three hundred eighty-one million, one hundred seventy-two thousand, four hundred eighty-one".