65516287 has 2 divisors, whose sum is σ = 65516288. Its totient is φ = 65516286.

The previous prime is 65516281. The next prime is 65516291. The reversal of 65516287 is 78261556.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65516287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65516281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32758143 + 32758144.

It is an arithmetic number, because the mean of its divisors is an integer number (32758144).

Almost surely, 2^65516287 is an apocalyptic number.

65516287 is a deficient number, since it is larger than the sum of its proper divisors (1).

65516287 is an equidigital number, since it uses as much as digits as its factorization.

65516287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The square root of 65516287 is about 8094.2131797970. The cubic root of 65516287 is about 403.1343073948.

The spelling of 65516287 in words is "sixty-five million, five hundred sixteen thousand, two hundred eighty-seven".