215030155 has 8 divisors (see below), whose sum is σ = 258312672. Its totient is φ = 171839808.

The previous prime is 215030149. The next prime is 215030171. The reversal of 215030155 is 551030512.

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

It is a cyclic number.

It is not a de Polignac number, because 215030155 - 2³ = 215030147 is a prime.

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, 17799 + ... + 27328.

It is an arithmetic number, because the mean of its divisors is an integer number (32289084).

Almost surely, 2^215030155 is an apocalyptic number.

215030155 is a deficient number, since it is larger than the sum of its proper divisors (43282517).

215030155 is an equidigital number, since it uses as much as digits as its factorization.

215030155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46085.

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

The square root of 215030155 is about 14663.9065395276. The cubic root of 215030155 is about 599.1006479872.

Adding to 215030155 its reverse (551030512), we get a palindrome (766060667).

The spelling of 215030155 in words is "two hundred fifteen million, thirty thousand, one hundred fifty-five".