215264515 has 8 divisors (see below), whose sum is σ = 258470928. Its totient is φ = 172109280.

The previous prime is 215264459. The next prime is 215264531. The reversal of 215264515 is 515462512.

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

It is a de Polignac number, because none of the positive numbers 2^k-215264515 is a prime.

It is a super-2 number, since 2×215264515² = 92677622836370450, which contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 2832 + ... + 20941.

It is an arithmetic number, because the mean of its divisors is an integer number (32308866).

Almost surely, 2^215264515 is an apocalyptic number.

215264515 is a deficient number, since it is larger than the sum of its proper divisors (43206413).

215264515 is a wasteful number, since it uses less digits than its factorization.

215264515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25589.

The product of its digits is 12000, while the sum is 31.

The square root of 215264515 is about 14671.8954126589. The cubic root of 215264515 is about 599.3182209594.

The spelling of 215264515 in words is "two hundred fifteen million, two hundred sixty-four thousand, five hundred fifteen".