215045155 has 32 divisors (see below), whose sum is σ = 298505088. Its totient is φ = 147302400.

The previous prime is 215045153. The next prime is 215045197. The reversal of 215045155 is 551540512.

It is not a de Polignac number, because 215045155 - 2¹ = 215045153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215045153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77085 + ... + 79825.

It is an arithmetic number, because the mean of its divisors is an integer number (9328284).

Almost surely, 2^215045155 is an apocalyptic number.

215045155 is a deficient number, since it is larger than the sum of its proper divisors (83459933).

215045155 is a wasteful number, since it uses less digits than its factorization.

215045155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 215045155 is about 14664.4179904966. The cubic root of 215045155 is about 599.1145782826.

Adding to 215045155 its reverse (551540512), we get a palindrome (766585667).

The spelling of 215045155 in words is "two hundred fifteen million, forty-five thousand, one hundred fifty-five".