51375217 has 2 divisors, whose sum is σ = 51375218. Its totient is φ = 51375216.

The previous prime is 51375199. The next prime is 51375251. The reversal of 51375217 is 71257315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30206016 + 21169201 = 5496^2 + 4601^2 .

It is a cyclic number.

It is not a de Polignac number, because 51375217 - 2¹⁹ = 50850929 is a prime.

It is not a weakly prime, because it can be changed into another prime (51375287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25687608 + 25687609.

It is an arithmetic number, because the mean of its divisors is an integer number (25687609).

Almost surely, 2^51375217 is an apocalyptic number.

It is an amenable number.

51375217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51375217 is an equidigital number, since it uses as much as digits as its factorization.

51375217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7350, while the sum is 31.

The square root of 51375217 is about 7167.6507308881. The cubic root of 51375217 is about 371.7502104843.

The spelling of 51375217 in words is "fifty-one million, three hundred seventy-five thousand, two hundred seventeen".