51136873 has 2 divisors, whose sum is σ = 51136874. Its totient is φ = 51136872.

The previous prime is 51136859. The next prime is 51136909. The reversal of 51136873 is 37863115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38837824 + 12299049 = 6232^2 + 3507^2 .

It is a cyclic number.

It is not a de Polignac number, because 51136873 - 2²⁵ = 17582441 is a prime.

It is a super-2 number, since 2×51136873² = 5229959560436258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51136823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25568436 + 25568437.

It is an arithmetic number, because the mean of its divisors is an integer number (25568437).

Almost surely, 2^51136873 is an apocalyptic number.

It is an amenable number.

51136873 is a deficient number, since it is larger than the sum of its proper divisors (1).

51136873 is an equidigital number, since it uses as much as digits as its factorization.

51136873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 51136873 is about 7151.0050342592. The cubic root of 51136873 is about 371.1744347709.

Adding to 51136873 its reverse (37863115), we get a palindrome (88999988).

The spelling of 51136873 in words is "fifty-one million, one hundred thirty-six thousand, eight hundred seventy-three".