215045550 has 48 divisors (see below), whose sum is σ = 592573680. Its totient is φ = 57345120.

The previous prime is 215045513. The next prime is 215045573. The reversal of 215045550 is 55540512.

215045550 is a `hidden beast` number, since 21 + 50 + 45 + 550 = 666.

215045550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78297 + ... + 80996.

It is an arithmetic number, because the mean of its divisors is an integer number (12345285).

Almost surely, 2^215045550 is an apocalyptic number.

215045550 is an abundant number, since it is smaller than the sum of its proper divisors (377528130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215045550 is a wasteful number, since it uses less digits than its factorization.

215045550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159314 (or 159303 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 215045550 is about 14664.4314584644. The cubic root of 215045550 is about 599.1149451050.

The spelling of 215045550 in words is "two hundred fifteen million, forty-five thousand, five hundred fifty".