51867317 has 2 divisors, whose sum is σ = 51867318. Its totient is φ = 51867316.

The previous prime is 51867311. The next prime is 51867329. The reversal of 51867317 is 71376815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37834801 + 14032516 = 6151^2 + 3746^2 .

It is a cyclic number.

It is not a de Polignac number, because 51867317 - 2⁴ = 51867301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51867311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25933658 + 25933659.

It is an arithmetic number, because the mean of its divisors is an integer number (25933659).

Almost surely, 2^51867317 is an apocalyptic number.

It is an amenable number.

51867317 is a deficient number, since it is larger than the sum of its proper divisors (1).

51867317 is an equidigital number, since it uses as much as digits as its factorization.

51867317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 51867317 is about 7201.8967640476. The cubic root of 51867317 is about 372.9333832496.

The spelling of 51867317 in words is "fifty-one million, eight hundred sixty-seven thousand, three hundred seventeen".