51265817 has 2 divisors, whose sum is σ = 51265818. Its totient is φ = 51265816.

The previous prime is 51265807. The next prime is 51265843. The reversal of 51265817 is 71856215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36048016 + 15217801 = 6004^2 + 3901^2 .

It is a cyclic number.

It is not a de Polignac number, because 51265817 - 2⁸ = 51265561 is a prime.

It is not a weakly prime, because it can be changed into another prime (51265807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25632908 + 25632909.

It is an arithmetic number, because the mean of its divisors is an integer number (25632909).

Almost surely, 2^51265817 is an apocalyptic number.

It is an amenable number.

51265817 is a deficient number, since it is larger than the sum of its proper divisors (1).

51265817 is an equidigital number, since it uses as much as digits as its factorization.

51265817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 35.

The square root of 51265817 is about 7160.0151536152. The cubic root of 51265817 is about 371.4861507734.

The spelling of 51265817 in words is "fifty-one million, two hundred sixty-five thousand, eight hundred seventeen".