51530737 has 2 divisors, whose sum is σ = 51530738. Its totient is φ = 51530736.

The previous prime is 51530729. The next prime is 51530747. The reversal of 51530737 is 73703515.

It is a happy number.

51530737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32729841 + 18800896 = 5721^2 + 4336^2 .

It is a cyclic number.

It is not a de Polignac number, because 51530737 - 2³ = 51530729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51530699 and 51530708.

It is not a weakly prime, because it can be changed into another prime (51530707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25765368 + 25765369.

It is an arithmetic number, because the mean of its divisors is an integer number (25765369).

Almost surely, 2^51530737 is an apocalyptic number.

It is an amenable number.

51530737 is a deficient number, since it is larger than the sum of its proper divisors (1).

51530737 is an equidigital number, since it uses as much as digits as its factorization.

51530737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11025, while the sum is 31.

The square root of 51530737 is about 7178.4912760273. The cubic root of 51530737 is about 372.1249459851.

The spelling of 51530737 in words is "fifty-one million, five hundred thirty thousand, seven hundred thirty-seven".