51317507 has 2 divisors, whose sum is σ = 51317508. Its totient is φ = 51317506.

The previous prime is 51317479. The next prime is 51317573. The reversal of 51317507 is 70571315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51317507 - 2⁸ = 51317251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51317507.

It is not a weakly prime, because it can be changed into another prime (51314507) 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, 25658753 + 25658754.

It is an arithmetic number, because the mean of its divisors is an integer number (25658754).

Almost surely, 2^51317507 is an apocalyptic number.

51317507 is a deficient number, since it is larger than the sum of its proper divisors (1).

51317507 is an equidigital number, since it uses as much as digits as its factorization.

51317507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3675, while the sum is 29.

The square root of 51317507 is about 7163.6238734317. The cubic root of 51317507 is about 371.6109621338.

The spelling of 51317507 in words is "fifty-one million, three hundred seventeen thousand, five hundred seven".