65512 has 16 divisors (see below), whose sum is σ = 129600. Its totient is φ = 30960.

The previous prime is 65497. The next prime is 65519. The reversal of 65512 is 21556.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a nialpdrome in base 4 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 65512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65519) by changing a digit.

65512 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64 + ... + 367.

It is an arithmetic number, because the mean of its divisors is an integer number (8100).

2⁶⁵⁵¹² is an apocalyptic number.

It is an amenable number.

65512 is a deficient number, since it is larger than the sum of its proper divisors (64088).

65512 is a wasteful number, since it uses less digits than its factorization.

65512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 452 counting only the distinct ones).

The product of its digits is 300, while the sum is 19.

The square root of 65512 is about 255.9531207077. The cubic root of 65512 is about 40.3125514291.

Subtracting from 65512 its reverse (21556), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 65512 in words is "sixty-five thousand, five hundred twelve".