6515857228 has 24 divisors (see below), whose sum is σ = 11813986800. Its totient is φ = 3140776128.

The previous prime is 6515857219. The next prime is 6515857237. The reversal of 6515857228 is 8227585156.

It is an interprime number because it is at equal distance from previous prime (6515857219) and next prime (6515857237).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33826 + ... + 119062.

It is an arithmetic number, because the mean of its divisors is an integer number (492249450).

Almost surely, 2^6515857228 is an apocalyptic number.

It is an amenable number.

6515857228 is a deficient number, since it is larger than the sum of its proper divisors (5298129572).

6515857228 is a wasteful number, since it uses less digits than its factorization.

6515857228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85929 (or 85927 counting only the distinct ones).

The product of its digits is 1344000, while the sum is 49.

The square root of 6515857228 is about 80720.8599309992. The cubic root of 6515857228 is about 1867.7719685363.

The spelling of 6515857228 in words is "six billion, five hundred fifteen million, eight hundred fifty-seven thousand, two hundred twenty-eight".