51508073 has 2 divisors, whose sum is σ = 51508074. Its totient is φ = 51508072.

The previous prime is 51508043. The next prime is 51508117. The reversal of 51508073 is 37080515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43138624 + 8369449 = 6568^2 + 2893^2 .

It is a cyclic number.

It is not a de Polignac number, because 51508073 - 2¹⁴ = 51491689 is a prime.

It is not a weakly prime, because it can be changed into another prime (51508043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25754036 + 25754037.

It is an arithmetic number, because the mean of its divisors is an integer number (25754037).

Almost surely, 2^51508073 is an apocalyptic number.

It is an amenable number.

51508073 is a deficient number, since it is larger than the sum of its proper divisors (1).

51508073 is an equidigital number, since it uses as much as digits as its factorization.

51508073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 51508073 is about 7176.9124977249. The cubic root of 51508073 is about 372.0703825859.

Adding to 51508073 its reverse (37080515), we get a palindrome (88588588).

The spelling of 51508073 in words is "fifty-one million, five hundred eight thousand, seventy-three".