51865273 has 2 divisors, whose sum is σ = 51865274. Its totient is φ = 51865272.

The previous prime is 51865223. The next prime is 51865279. The reversal of 51865273 is 37256815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30824704 + 21040569 = 5552^2 + 4587^2 .

It is a cyclic number.

It is not a de Polignac number, because 51865273 - 2²⁵ = 18310841 is a prime.

It is not a weakly prime, because it can be changed into another prime (51865279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25932636 + 25932637.

It is an arithmetic number, because the mean of its divisors is an integer number (25932637).

Almost surely, 2^51865273 is an apocalyptic number.

It is an amenable number.

51865273 is a deficient number, since it is larger than the sum of its proper divisors (1).

51865273 is an equidigital number, since it uses as much as digits as its factorization.

51865273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 51865273 is about 7201.7548555890. The cubic root of 51865273 is about 372.9284843017.

The spelling of 51865273 in words is "fifty-one million, eight hundred sixty-five thousand, two hundred seventy-three".