215213515 has 8 divisors (see below), whose sum is σ = 281734128. Its totient is φ = 156518880.

The previous prime is 215213503. The next prime is 215213539. The reversal of 215213515 is 515312512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215213515 - 2⁵ = 215213483 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 215213515.

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, 1956432 + ... + 1956541.

It is an arithmetic number, because the mean of its divisors is an integer number (35216766).

Almost surely, 2^215213515 is an apocalyptic number.

215213515 is a deficient number, since it is larger than the sum of its proper divisors (66520613).

215213515 is a wasteful number, since it uses less digits than its factorization.

215213515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912989.

The product of its digits is 1500, while the sum is 25.

The square root of 215213515 is about 14670.1572929536. The cubic root of 215213515 is about 599.2708874986.

The spelling of 215213515 in words is "two hundred fifteen million, two hundred thirteen thousand, five hundred fifteen".