51365539 has 2 divisors, whose sum is σ = 51365540. Its totient is φ = 51365538.

The previous prime is 51365513. The next prime is 51365557. The reversal of 51365539 is 93556315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51365539 - 2⁷ = 51365411 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51365498 and 51365507.

It is not a weakly prime, because it can be changed into another prime (51360539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25682769 + 25682770.

It is an arithmetic number, because the mean of its divisors is an integer number (25682770).

Almost surely, 2^51365539 is an apocalyptic number.

51365539 is a deficient number, since it is larger than the sum of its proper divisors (1).

51365539 is an equidigital number, since it uses as much as digits as its factorization.

51365539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60750, while the sum is 37.

The square root of 51365539 is about 7166.9755824895. The cubic root of 51365539 is about 371.7268657364.

The spelling of 51365539 in words is "fifty-one million, three hundred sixty-five thousand, five hundred thirty-nine".