51247733 has 2 divisors, whose sum is σ = 51247734. Its totient is φ = 51247732.

The previous prime is 51247717. The next prime is 51247759. The reversal of 51247733 is 33774215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42941809 + 8305924 = 6553^2 + 2882^2 .

It is a cyclic number.

It is not a de Polignac number, because 51247733 - 2⁴ = 51247717 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 51247733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51247793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25623866 + 25623867.

It is an arithmetic number, because the mean of its divisors is an integer number (25623867).

Almost surely, 2^51247733 is an apocalyptic number.

It is an amenable number.

51247733 is a deficient number, since it is larger than the sum of its proper divisors (1).

51247733 is an equidigital number, since it uses as much as digits as its factorization.

51247733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 32.

The square root of 51247733 is about 7158.7521957391. The cubic root of 51247733 is about 371.4424650974.

The spelling of 51247733 in words is "fifty-one million, two hundred forty-seven thousand, seven hundred thirty-three".