215515517060 has 24 divisors (see below), whose sum is σ = 453081612480. Its totient is φ = 86111154144.

The previous prime is 215515517059. The next prime is 215515517081. The reversal of 215515517060 is 60715515512.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5922200 + ... + 5958479.

It is an arithmetic number, because the mean of its divisors is an integer number (18878400520).

Almost surely, 2^215515517060 is an apocalyptic number.

215515517060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215515517060 is an abundant number, since it is smaller than the sum of its proper divisors (237566095420).

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

215515517060 is a wasteful number, since it uses less digits than its factorization.

215515517060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11881595 (or 11881593 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 38.

The spelling of 215515517060 in words is "two hundred fifteen billion, five hundred fifteen million, five hundred seventeen thousand, sixty".