8513016381 has 32 divisors (see below), whose sum is σ = 13614048000. Its totient is φ = 5241386304.

The previous prime is 8513016377. The next prime is 8513016397. The reversal of 8513016381 is 1836103158.

8513016381 is a `hidden beast` number, since 8 + 5 + 13 + 0 + 1 + 638 + 1 = 666.

It is not a de Polignac number, because 8513016381 - 2² = 8513016377 is a prime.

It is a super-2 number, since 2×8513016381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8513016301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218346 + ... + 254363.

It is an arithmetic number, because the mean of its divisors is an integer number (425439000).

Almost surely, 2^8513016381 is an apocalyptic number.

It is an amenable number.

8513016381 is a deficient number, since it is larger than the sum of its proper divisors (5101031619).

8513016381 is a wasteful number, since it uses less digits than its factorization.

8513016381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472770 (or 472764 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 8513016381 is about 92266.0088060603. The cubic root of 8513016381 is about 2041.8687525622.

The spelling of 8513016381 in words is "eight billion, five hundred thirteen million, sixteen thousand, three hundred eighty-one".