6315215138 has 16 divisors (see below), whose sum is σ = 9515548224. Its totient is φ = 3143392560.

The previous prime is 6315215129. The next prime is 6315215141. The reversal of 6315215138 is 8315125136.

It is a junction number, because it is equal to n+sod(n) for n = 6315215098 and 6315215107.

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, 508256 + ... + 520532.

It is an arithmetic number, because the mean of its divisors is an integer number (594721764).

Almost surely, 2^6315215138 is an apocalyptic number.

6315215138 is a deficient number, since it is larger than the sum of its proper divisors (3200333086).

6315215138 is a wasteful number, since it uses less digits than its factorization.

6315215138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13417.

The product of its digits is 21600, while the sum is 35.

The square root of 6315215138 is about 79468.3278923119. The cubic root of 6315215138 is about 1848.4003838236.

The spelling of 6315215138 in words is "six billion, three hundred fifteen million, two hundred fifteen thousand, one hundred thirty-eight".