2051217 has 16 divisors (see below), whose sum is σ = 3473280. Its totient is φ = 1172016.

The previous prime is 2051191. The next prime is 2051219. The reversal of 2051217 is 7121502.

It is not a de Polignac number, because 2051217 - 2¹⁰ = 2050193 is a prime.

2051217 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051217.

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 15 ways as a sum of consecutive naturals, for example, 5238 + ... + 5615.

It is an arithmetic number, because the mean of its divisors is an integer number (217080).

2^2051217 is an apocalyptic number.

2051217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2051217 is a deficient number, since it is larger than the sum of its proper divisors (1422063).

2051217 is a wasteful number, since it uses less digits than its factorization.

2051217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10869 (or 10863 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2051217 is about 1432.2070381059. The cubic root of 2051217 is about 127.0585424603.

Adding to 2051217 its reverse (7121502), we get a palindrome (9172719).

The spelling of 2051217 in words is "two million, fifty-one thousand, two hundred seventeen".