51584857 has 2 divisors, whose sum is σ = 51584858. Its totient is φ = 51584856.

The previous prime is 51584849. The next prime is 51584861. The reversal of 51584857 is 75848515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46090521 + 5494336 = 6789^2 + 2344^2 .

It is a cyclic number.

It is not a de Polignac number, because 51584857 - 2³ = 51584849 is a prime.

It is not a weakly prime, because it can be changed into another prime (51584887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25792428 + 25792429.

It is an arithmetic number, because the mean of its divisors is an integer number (25792429).

Almost surely, 2^51584857 is an apocalyptic number.

It is an amenable number.

51584857 is a deficient number, since it is larger than the sum of its proper divisors (1).

51584857 is an equidigital number, since it uses as much as digits as its factorization.

51584857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224000, while the sum is 43.

The square root of 51584857 is about 7182.2598811238. The cubic root of 51584857 is about 372.2551747697.

It can be divided in two parts, 51584 and 857, that added together give a square (52441 = 229²).

The spelling of 51584857 in words is "fifty-one million, five hundred eighty-four thousand, eight hundred fifty-seven".