51704287 has 2 divisors, whose sum is σ = 51704288. Its totient is φ = 51704286.

The previous prime is 51704267. The next prime is 51704291. The reversal of 51704287 is 78240715.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51704287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51704227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25852143 + 25852144.

It is an arithmetic number, because the mean of its divisors is an integer number (25852144).

Almost surely, 2^51704287 is an apocalyptic number.

51704287 is a deficient number, since it is larger than the sum of its proper divisors (1).

51704287 is an equidigital number, since it uses as much as digits as its factorization.

51704287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 51704287 is about 7190.5693098669. The cubic root of 51704287 is about 372.5422368515.

The spelling of 51704287 in words is "fifty-one million, seven hundred four thousand, two hundred eighty-seven".