51036857 has 2 divisors, whose sum is σ = 51036858. Its totient is φ = 51036856.

The previous prime is 51036851. The next prime is 51036871. The reversal of 51036857 is 75863015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51036736 + 121 = 7144^2 + 11^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51036857 is a prime.

It is not a weakly prime, because it can be changed into another prime (51036851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25518428 + 25518429.

It is an arithmetic number, because the mean of its divisors is an integer number (25518429).

Almost surely, 2^51036857 is an apocalyptic number.

It is an amenable number.

51036857 is a deficient number, since it is larger than the sum of its proper divisors (1).

51036857 is an equidigital number, since it uses as much as digits as its factorization.

51036857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 51036857 is about 7144.0084686400. The cubic root of 51036857 is about 370.9322897915.

The spelling of 51036857 in words is "fifty-one million, thirty-six thousand, eight hundred fifty-seven".