13515103785 has 48 divisors (see below), whose sum is σ = 23064374592. Its totient is φ = 6756480000.

The previous prime is 13515103783. The next prime is 13515103787. The reversal of 13515103785 is 58730151531.

It is an interprime number because it is at equal distance from previous prime (13515103783) and next prime (13515103787).

It is not a de Polignac number, because 13515103785 - 2¹ = 13515103783 is a prime.

13515103785 is a modest number, since divided by 103785 gives 13515 as remainder.

It is not an unprimeable number, because it can be changed into a prime (13515103781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1081875 + ... + 1094295.

It is an arithmetic number, because the mean of its divisors is an integer number (480507804).

Almost surely, 2^13515103785 is an apocalyptic number.

13515103785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13515103785 is a deficient number, since it is larger than the sum of its proper divisors (9549270807).

13515103785 is a wasteful number, since it uses less digits than its factorization.

13515103785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12714 (or 12697 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 13515103785 in words is "thirteen billion, five hundred fifteen million, one hundred three thousand, seven hundred eighty-five".