115515020 has 12 divisors (see below), whose sum is σ = 242581584. Its totient is φ = 46206000.

The previous prime is 115515019. The next prime is 115515053. The reversal of 115515020 is 20515511.

115515020 = T₆₇₉₅ + T₆₇₉₆ + ... + T₆₇₉₉.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5775751 = 115515020 / (1 + 1 + 5 + 5 + 1 + 5 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 115514983 and 115515001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2887856 + ... + 2887895.

It is an arithmetic number, because the mean of its divisors is an integer number (20215132).

Almost surely, 2^115515020 is an apocalyptic number.

115515020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115515020 is an abundant number, since it is smaller than the sum of its proper divisors (127066564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115515020 is a wasteful number, since it uses less digits than its factorization.

115515020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775760 (or 5775758 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 115515020 is about 10747.7914010275. The cubic root of 115515020 is about 487.0192780352.

The spelling of 115515020 in words is "one hundred fifteen million, five hundred fifteen thousand, twenty".