215165442 has 16 divisors (see below), whose sum is σ = 445170240. Its totient is φ = 69248592.

The previous prime is 215165441. The next prime is 215165449. The reversal of 215165442 is 244561512.

It is not an unprimeable number, because it can be changed into a prime (215165441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618118 + ... + 618465.

It is an arithmetic number, because the mean of its divisors is an integer number (27823140).

Almost surely, 2^215165442 is an apocalyptic number.

215165442 is an abundant number, since it is smaller than the sum of its proper divisors (230004798).

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

215165442 is a wasteful number, since it uses less digits than its factorization.

215165442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236617.

The product of its digits is 9600, while the sum is 30.

The square root of 215165442 is about 14668.5187391229. The cubic root of 215165442 is about 599.2262637604.

The spelling of 215165442 in words is "two hundred fifteen million, one hundred sixty-five thousand, four hundred forty-two".