51481733 has 2 divisors, whose sum is σ = 51481734. Its totient is φ = 51481732.

The previous prime is 51481721. The next prime is 51481741. The reversal of 51481733 is 33718415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51294244 + 187489 = 7162^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 51481733 - 2⁸ = 51481477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51481733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51481753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25740866 + 25740867.

It is an arithmetic number, because the mean of its divisors is an integer number (25740867).

Almost surely, 2^51481733 is an apocalyptic number.

It is an amenable number.

51481733 is a deficient number, since it is larger than the sum of its proper divisors (1).

51481733 is an equidigital number, since it uses as much as digits as its factorization.

51481733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 51481733 is about 7175.0772121281. The cubic root of 51481733 is about 372.0069491321.

It can be divided in two parts, 514817 and 33, that multiplied together give a palindrome (16988961).

The spelling of 51481733 in words is "fifty-one million, four hundred eighty-one thousand, seven hundred thirty-three".