215515030 has 8 divisors (see below), whose sum is σ = 387927072. Its totient is φ = 86206008.

The previous prime is 215515021. The next prime is 215515051. The reversal of 215515030 is 30515512.

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

It is a junction number, because it is equal to n+sod(n) for n = 215514992 and 215515010.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 10775742 + ... + 10775761.

It is an arithmetic number, because the mean of its divisors is an integer number (48490884).

Almost surely, 2^215515030 is an apocalyptic number.

215515030 is a deficient number, since it is larger than the sum of its proper divisors (172412042).

215515030 is a wasteful number, since it uses less digits than its factorization.

215515030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21551510.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 215515030 is about 14680.4301708090. The cubic root of 215515030 is about 599.5506172129.

The spelling of 215515030 in words is "two hundred fifteen million, five hundred fifteen thousand, thirty".