215515064 has 16 divisors (see below), whose sum is σ = 404250720. Its totient is φ = 107714880.

The previous prime is 215515057. The next prime is 215515099. The reversal of 215515064 is 460515512.

It is a happy number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 29612 + ... + 36164.

It is an arithmetic number, because the mean of its divisors is an integer number (25265670).

Almost surely, 2^215515064 is an apocalyptic number.

It is an amenable number.

215515064 is a deficient number, since it is larger than the sum of its proper divisors (188735656).

215515064 is a wasteful number, since it uses less digits than its factorization.

215515064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10670 (or 10666 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 215515064 is about 14680.4313288132. The cubic root of 215515064 is about 599.5506487416.

The spelling of 215515064 in words is "two hundred fifteen million, five hundred fifteen thousand, sixty-four".