51617273 has 2 divisors, whose sum is σ = 51617274. Its totient is φ = 51617272.

The previous prime is 51617261. The next prime is 51617297. The reversal of 51617273 is 37271615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48330304 + 3286969 = 6952^2 + 1813^2 .

It is a cyclic number.

It is not a de Polignac number, because 51617273 - 2⁸ = 51617017 is a prime.

It is not a weakly prime, because it can be changed into another prime (51617173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808636 + 25808637.

It is an arithmetic number, because the mean of its divisors is an integer number (25808637).

Almost surely, 2^51617273 is an apocalyptic number.

It is an amenable number.

51617273 is a deficient number, since it is larger than the sum of its proper divisors (1).

51617273 is an equidigital number, since it uses as much as digits as its factorization.

51617273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 51617273 is about 7184.5161980470. The cubic root of 51617273 is about 372.3331336752. Note that the first 3 decimals are identical.

Adding to 51617273 its reverse (37271615), we get a palindrome (88888888).

The spelling of 51617273 in words is "fifty-one million, six hundred seventeen thousand, two hundred seventy-three".