51284873 has 2 divisors, whose sum is σ = 51284874. Its totient is φ = 51284872.

The previous prime is 51284861. The next prime is 51284879. The reversal of 51284873 is 37848215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51093904 + 190969 = 7148^2 + 437^2 .

It is a cyclic number.

It is not a de Polignac number, because 51284873 - 2¹⁴ = 51268489 is a prime.

It is a super-2 number, since 2×51284873² = 5260276397252258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51284879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25642436 + 25642437.

It is an arithmetic number, because the mean of its divisors is an integer number (25642437).

Almost surely, 2^51284873 is an apocalyptic number.

It is an amenable number.

51284873 is a deficient number, since it is larger than the sum of its proper divisors (1).

51284873 is an equidigital number, since it uses as much as digits as its factorization.

51284873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 51284873 is about 7161.3457534181. The cubic root of 51284873 is about 371.5321734032.

It can be divided in two parts, 5128 and 4873, that added together give a palindrome (10001).

The spelling of 51284873 in words is "fifty-one million, two hundred eighty-four thousand, eight hundred seventy-three".