51067217 has 4 divisors (see below), whose sum is σ = 51410100. Its totient is φ = 50724336.

The previous prime is 51067213. The next prime is 51067241. The reversal of 51067217 is 71276015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26306641 + 24760576 = 5129^2 + 4976^2 .

It is a cyclic number.

It is not a de Polignac number, because 51067217 - 2² = 51067213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51067217.

It is not an unprimeable number, because it can be changed into a prime (51067213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171218 + ... + 171515.

It is an arithmetic number, because the mean of its divisors is an integer number (12852525).

Almost surely, 2^51067217 is an apocalyptic number.

It is an amenable number.

51067217 is a deficient number, since it is larger than the sum of its proper divisors (342883).

51067217 is a wasteful number, since it uses less digits than its factorization.

51067217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342882.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 51067217 is about 7146.1330102371. The cubic root of 51067217 is about 371.0058266607.

The spelling of 51067217 in words is "fifty-one million, sixty-seven thousand, two hundred seventeen".