51717287 has 2 divisors, whose sum is σ = 51717288. Its totient is φ = 51717286.

The previous prime is 51717251. The next prime is 51717293. The reversal of 51717287 is 78271715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51717287 - 2¹⁶ = 51651751 is a prime.

It is a Chen prime.

It is equal to p_3097838 and since 51717287 and 3097838 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51717287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51717187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25858643 + 25858644.

It is an arithmetic number, because the mean of its divisors is an integer number (25858644).

Almost surely, 2^51717287 is an apocalyptic number.

51717287 is a deficient number, since it is larger than the sum of its proper divisors (1).

51717287 is an equidigital number, since it uses as much as digits as its factorization.

51717287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27440, while the sum is 38.

The square root of 51717287 is about 7191.4732148566. The cubic root of 51717287 is about 372.5734569786.

The spelling of 51717287 in words is "fifty-one million, seven hundred seventeen thousand, two hundred eighty-seven".