115215205515 has 16 divisors (see below), whose sum is σ = 194046662400. Its totient is φ = 58213998432.

The previous prime is 115215205463. The next prime is 115215205583. The reversal of 115215205515 is 515502512511.

It is not a de Polignac number, because 115215205515 - 2¹³ = 115215197323 is a prime.

It is a super-4 number, since 4×115215205515⁴ (a number of 45 digits) contains 4444 as substring.

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, 202131655 + ... + 202132224.

It is an arithmetic number, because the mean of its divisors is an integer number (12127916400).

Almost surely, 2^115215205515 is an apocalyptic number.

115215205515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115215205515 is a deficient number, since it is larger than the sum of its proper divisors (78831456885).

115215205515 is a wasteful number, since it uses less digits than its factorization.

115215205515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404263906.

The product of its (nonzero) digits is 12500, while the sum is 33.

The spelling of 115215205515 in words is "one hundred fifteen billion, two hundred fifteen million, two hundred five thousand, five hundred fifteen".