51337217 has 2 divisors, whose sum is σ = 51337218. Its totient is φ = 51337216.

The previous prime is 51337213. The next prime is 51337267. The reversal of 51337217 is 71273315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51208336 + 128881 = 7156^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 51337217 - 2² = 51337213 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51337217.

It is not a weakly prime, because it can be changed into another prime (51337213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25668608 + 25668609.

It is an arithmetic number, because the mean of its divisors is an integer number (25668609).

Almost surely, 2^51337217 is an apocalyptic number.

It is an amenable number.

51337217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51337217 is an equidigital number, since it uses as much as digits as its factorization.

51337217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4410, while the sum is 29.

The square root of 51337217 is about 7164.9994417306. Note that the first 3 decimals coincide. The cubic root of 51337217 is about 371.6585320891.

The spelling of 51337217 in words is "fifty-one million, three hundred thirty-seven thousand, two hundred seventeen".