51351533 has 2 divisors, whose sum is σ = 51351534. Its totient is φ = 51351532.

The previous prime is 51351529. The next prime is 51351551. The reversal of 51351533 is 33515315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49603849 + 1747684 = 7043^2 + 1322^2 .

It is a cyclic number.

It is not a de Polignac number, because 51351533 - 2² = 51351529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51351563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25675766 + 25675767.

It is an arithmetic number, because the mean of its divisors is an integer number (25675767).

Almost surely, 2^51351533 is an apocalyptic number.

It is an amenable number.

51351533 is a deficient number, since it is larger than the sum of its proper divisors (1).

51351533 is an equidigital number, since it uses as much as digits as its factorization.

51351533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3375, while the sum is 26.

The square root of 51351533 is about 7165.9983951994. The cubic root of 51351533 is about 371.6930760279.

Adding to 51351533 its reverse (33515315), we get a palindrome (84866848).

The spelling of 51351533 in words is "fifty-one million, three hundred fifty-one thousand, five hundred thirty-three".