51533539 has 2 divisors, whose sum is σ = 51533540. Its totient is φ = 51533538.

The previous prime is 51533527. The next prime is 51533549. The reversal of 51533539 is 93533515.

51533539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51533539 - 2⁵ = 51533507 is a prime.

It is not a weakly prime, because it can be changed into another prime (51533549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25766769 + 25766770.

It is an arithmetic number, because the mean of its divisors is an integer number (25766770).

Almost surely, 2^51533539 is an apocalyptic number.

51533539 is a deficient number, since it is larger than the sum of its proper divisors (1).

51533539 is an equidigital number, since it uses as much as digits as its factorization.

51533539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30375, while the sum is 34.

The square root of 51533539 is about 7178.6864397326. The cubic root of 51533539 is about 372.1316906665.

The spelling of 51533539 in words is "fifty-one million, five hundred thirty-three thousand, five hundred thirty-nine".