65112520 has 64 divisors (see below), whose sum is σ = 161274240. Its totient is φ = 23657920.

The previous prime is 65112491. The next prime is 65112539. The reversal of 65112520 is 2521156.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 65112491 and 65112500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52629 + ... + 53851.

It is an arithmetic number, because the mean of its divisors is an integer number (2519910).

Almost surely, 2^65112520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65112520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80637120).

65112520 is an abundant number, since it is smaller than the sum of its proper divisors (96161720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65112520 is a wasteful number, since it uses less digits than its factorization.

65112520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 65112520 is about 8069.2329251299. The cubic root of 65112520 is about 402.3044482998.

Adding to 65112520 its reverse (2521156), we get a palindrome (67633676).

The spelling of 65112520 in words is "sixty-five million, one hundred twelve thousand, five hundred twenty".