51220033 has 2 divisors, whose sum is σ = 51220034. Its totient is φ = 51220032.

The previous prime is 51219983. The next prime is 51220063. The reversal of 51220033 is 33002215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37736449 + 13483584 = 6143^2 + 3672^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51220033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51219989 and 51220016.

It is not a weakly prime, because it can be changed into another prime (51220063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25610016 + 25610017.

It is an arithmetic number, because the mean of its divisors is an integer number (25610017).

Almost surely, 2^51220033 is an apocalyptic number.

It is an amenable number.

51220033 is a deficient number, since it is larger than the sum of its proper divisors (1).

51220033 is an equidigital number, since it uses as much as digits as its factorization.

51220033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 51220033 is about 7156.8172395276. The cubic root of 51220033 is about 371.3755300350.

Adding to 51220033 its reverse (33002215), we get a palindrome (84222248).

The spelling of 51220033 in words is "fifty-one million, two hundred twenty thousand, thirty-three".