51656833 has 2 divisors, whose sum is σ = 51656834. Its totient is φ = 51656832.

The previous prime is 51656791. The next prime is 51656851. The reversal of 51656833 is 33865615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42614784 + 9042049 = 6528^2 + 3007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51656833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51656792 and 51656801.

It is not a weakly prime, because it can be changed into another prime (51656233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25828416 + 25828417.

It is an arithmetic number, because the mean of its divisors is an integer number (25828417).

Almost surely, 2^51656833 is an apocalyptic number.

It is an amenable number.

51656833 is a deficient number, since it is larger than the sum of its proper divisors (1).

51656833 is an equidigital number, since it uses as much as digits as its factorization.

51656833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 51656833 is about 7187.2688136732. The cubic root of 51656833 is about 372.4282293449.

The spelling of 51656833 in words is "fifty-one million, six hundred fifty-six thousand, eight hundred thirty-three".