215015515 has 16 divisors (see below), whose sum is σ = 303127776. Its totient is φ = 144345600.

The previous prime is 215015503. The next prime is 215015527. The reversal of 215015515 is 515510512.

It is an interprime number because it is at equal distance from previous prime (215015503) and next prime (215015527).

It is not a de Polignac number, because 215015515 - 2¹⁷ = 214884443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215015515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149646 + ... + 151075.

It is an arithmetic number, because the mean of its divisors is an integer number (18945486).

Almost surely, 2^215015515 is an apocalyptic number.

215015515 is a deficient number, since it is larger than the sum of its proper divisors (88112261).

215015515 is a wasteful number, since it uses less digits than its factorization.

215015515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300750.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 215015515 is about 14663.4073461798. The cubic root of 215015515 is about 599.0870513941.

The spelling of 215015515 in words is "two hundred fifteen million, fifteen thousand, five hundred fifteen".