2051218 has 8 divisors (see below), whose sum is σ = 3313548. Its totient is φ = 946704.

The previous prime is 2051191. The next prime is 2051219. The reversal of 2051218 is 8121502.

It can be written as a sum of positive squares in 2 ways, for example, as 1923769 + 127449 = 1387^2 + 357^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2051195 and 2051204.

It is not an unprimeable number, because it can be changed into a prime (2051219) 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 3 ways as a sum of consecutive naturals, for example, 39421 + ... + 39472.

2^2051218 is an apocalyptic number.

2051218 is a deficient number, since it is larger than the sum of its proper divisors (1262330).

2051218 is a wasteful number, since it uses less digits than its factorization.

2051218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78908.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2051218 is about 1432.2073872174. The cubic root of 2051218 is about 127.0585631080.

The spelling of 2051218 in words is "two million, fifty-one thousand, two hundred eighteen".