65512117 has 4 divisors (see below), whose sum is σ = 71467776. Its totient is φ = 59556460.

The previous prime is 65512087. The next prime is 65512129. The reversal of 65512117 is 71121556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65512117 - 2⁷ = 65511989 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 (65512147) 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, 2977813 + ... + 2977834.

It is an arithmetic number, because the mean of its divisors is an integer number (17866944).

Almost surely, 2^65512117 is an apocalyptic number.

It is an amenable number.

65512117 is a deficient number, since it is larger than the sum of its proper divisors (5955659).

65512117 is a wasteful number, since it uses less digits than its factorization.

65512117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955658.

The product of its digits is 2100, while the sum is 28.

The square root of 65512117 is about 8093.9555842616. The cubic root of 65512117 is about 403.1257542762.

It can be divided in two parts, 6551 and 2117, that added together give a palindrome (8668).

The spelling of 65512117 in words is "sixty-five million, five hundred twelve thousand, one hundred seventeen".