51289317 has 6 divisors (see below), whose sum is σ = 74084582. Its totient is φ = 34192872.

The previous prime is 51289307. The next prime is 51289321. The reversal of 51289317 is 71398215.

It can be written as a sum of positive squares in only one way, i.e., 46049796 + 5239521 = 6786^2 + 2289^2 .

It is not a de Polignac number, because 51289317 - 2¹⁴ = 51272933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51289307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2849398 + ... + 2849415.

Almost surely, 2^51289317 is an apocalyptic number.

It is an amenable number.

51289317 is a deficient number, since it is larger than the sum of its proper divisors (22795265).

51289317 is a wasteful number, since it uses less digits than its factorization.

51289317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5698819 (or 5698816 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 51289317 is about 7161.6560235744. The cubic root of 51289317 is about 371.5429045812.

The spelling of 51289317 in words is "fifty-one million, two hundred eighty-nine thousand, three hundred seventeen".