8731513285 has 16 divisors (see below), whose sum is σ = 11824496640. Its totient is φ = 6131218240.

The previous prime is 8731513237. The next prime is 8731513303. The reversal of 8731513285 is 5823151378.

It is a de Polignac number, because none of the positive numbers 2^k-8731513285 is a prime.

It is a super-2 number, since 2×8731513285² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2735557 + ... + 2738746.

It is an arithmetic number, because the mean of its divisors is an integer number (739031040).

Almost surely, 2^8731513285 is an apocalyptic number.

It is an amenable number.

8731513285 is a deficient number, since it is larger than the sum of its proper divisors (3092983355).

8731513285 is a wasteful number, since it uses less digits than its factorization.

8731513285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474348.

The product of its digits is 201600, while the sum is 43.

The square root of 8731513285 is about 93442.5667723228. The cubic root of 8731513285 is about 2059.1904071156.

The spelling of 8731513285 in words is "eight billion, seven hundred thirty-one million, five hundred thirteen thousand, two hundred eighty-five".