2145017218 has 8 divisors (see below), whose sum is σ = 3219307920. Its totient is φ = 1071914580.

The previous prime is 2145017209. The next prime is 2145017267. The reversal of 2145017218 is 8127105412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2145017218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292488 + ... + 299731.

It is an arithmetic number, because the mean of its divisors is an integer number (402413490).

Almost surely, 2^2145017218 is an apocalyptic number.

2145017218 is a deficient number, since it is larger than the sum of its proper divisors (1074290702).

2145017218 is a wasteful number, since it uses less digits than its factorization.

2145017218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594032.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2145017218 is about 46314.3305900021. The cubic root of 2145017218 is about 1289.6650409296.

The spelling of 2145017218 in words is "two billion, one hundred forty-five million, seventeen thousand, two hundred eighteen".