51015533 has 2 divisors, whose sum is σ = 51015534. Its totient is φ = 51015532.

The previous prime is 51015529. The next prime is 51015599. The reversal of 51015533 is 33551015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48413764 + 2601769 = 6958^2 + 1613^2 .

It is a cyclic number.

It is not a de Polignac number, because 51015533 - 2² = 51015529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51015499 and 51015508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51011533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25507766 + 25507767.

It is an arithmetic number, because the mean of its divisors is an integer number (25507767).

Almost surely, 2^51015533 is an apocalyptic number.

It is an amenable number.

51015533 is a deficient number, since it is larger than the sum of its proper divisors (1).

51015533 is an equidigital number, since it uses as much as digits as its factorization.

51015533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 51015533 is about 7142.5158732760. The cubic root of 51015533 is about 370.8806221505.

Adding to 51015533 its reverse (33551015), we get a palindrome (84566548).

The spelling of 51015533 in words is "fifty-one million, fifteen thousand, five hundred thirty-three".