65915247 has 4 divisors (see below), whose sum is σ = 87887000. Its totient is φ = 43943496.

The previous prime is 65915233. The next prime is 65915251. The reversal of 65915247 is 74251956.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65915247 - 2⁷ = 65915119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65915147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10985872 + ... + 10985877.

It is an arithmetic number, because the mean of its divisors is an integer number (21971750).

Almost surely, 2^65915247 is an apocalyptic number.

65915247 is a deficient number, since it is larger than the sum of its proper divisors (21971753).

65915247 is a wasteful number, since it uses less digits than its factorization.

65915247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21971752.

The product of its digits is 75600, while the sum is 39.

The square root of 65915247 is about 8118.8205424187. The cubic root of 65915247 is about 403.9509445224.

The spelling of 65915247 in words is "sixty-five million, nine hundred fifteen thousand, two hundred forty-seven".