215319489 has 16 divisors (see below), whose sum is σ = 357934080. Its totient is φ = 111854160.

The previous prime is 215319487. The next prime is 215319523. The reversal of 215319489 is 984913512.

It is not a de Polignac number, because 215319489 - 2¹ = 215319487 is a prime.

It is a super-2 number, since 2×215319489² = 92724964686442242, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 215319489.

It is not an unprimeable number, because it can be changed into a prime (215319487) by changing a digit.

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, 465829 + ... + 466290.

It is an arithmetic number, because the mean of its divisors is an integer number (22370880).

Almost surely, 2^215319489 is an apocalyptic number.

It is an amenable number.

215319489 is a deficient number, since it is larger than the sum of its proper divisors (142614591).

215319489 is a wasteful number, since it uses less digits than its factorization.

215319489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932140.

The product of its digits is 77760, while the sum is 42.

The square root of 215319489 is about 14673.7687388074. The cubic root of 215319489 is about 599.3692343457.

The spelling of 215319489 in words is "two hundred fifteen million, three hundred nineteen thousand, four hundred eighty-nine".