51205633 has 2 divisors, whose sum is σ = 51205634. Its totient is φ = 51205632.

The previous prime is 51205603. The next prime is 51205639. The reversal of 51205633 is 33650215.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51022449 + 183184 = 7143^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 51205633 - 2⁵ = 51205601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51205598 and 51205607.

It is not a weakly prime, because it can be changed into another prime (51205639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25602816 + 25602817.

It is an arithmetic number, because the mean of its divisors is an integer number (25602817).

Almost surely, 2^51205633 is an apocalyptic number.

It is an amenable number.

51205633 is a deficient number, since it is larger than the sum of its proper divisors (1).

51205633 is an equidigital number, since it uses as much as digits as its factorization.

51205633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 51205633 is about 7155.8111350147. The cubic root of 51205633 is about 371.3407239344.

Adding to 51205633 its reverse (33650215), we get a palindrome (84855848).

The spelling of 51205633 in words is "fifty-one million, two hundred five thousand, six hundred thirty-three".