215613064 has 32 divisors (see below), whose sum is σ = 434620800. Its totient is φ = 99956160.

The previous prime is 215613061. The next prime is 215613113. The reversal of 215613064 is 460316512.

It is not an unprimeable number, because it can be changed into a prime (215613061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7947 + ... + 22234.

It is an arithmetic number, because the mean of its divisors is an integer number (13581900).

Almost surely, 2^215613064 is an apocalyptic number.

It is an amenable number.

215613064 is an abundant number, since it is smaller than the sum of its proper divisors (219007736).

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

215613064 is a wasteful number, since it uses less digits than its factorization.

215613064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30253 (or 30249 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 215613064 is about 14683.7687260458. The cubic root of 215613064 is about 599.6415117789.

Adding to 215613064 its reverse (460316512), we get a palindrome (675929576).

The spelling of 215613064 in words is "two hundred fifteen million, six hundred thirteen thousand, sixty-four".