51317599 has 2 divisors, whose sum is σ = 51317600. Its totient is φ = 51317598.

The previous prime is 51317579. The next prime is 51317633. The reversal of 51317599 is 99571315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51317599 - 2⁷ = 51317471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51317579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25658799 + 25658800.

It is an arithmetic number, because the mean of its divisors is an integer number (25658800).

Almost surely, 2^51317599 is an apocalyptic number.

51317599 is a deficient number, since it is larger than the sum of its proper divisors (1).

51317599 is an equidigital number, since it uses as much as digits as its factorization.

51317599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42525, while the sum is 40.

The square root of 51317599 is about 7163.6302947598. The cubic root of 51317599 is about 371.6111842035.

The spelling of 51317599 in words is "fifty-one million, three hundred seventeen thousand, five hundred ninety-nine".