65513211 has 16 divisors (see below), whose sum is σ = 88560000. Its totient is φ = 43075008.

The previous prime is 65513113. The next prime is 65513213. The reversal of 65513211 is 11231556.

It is a de Polignac number, because none of the positive numbers 2^k-65513211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65513213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131040 + ... + 131538.

It is an arithmetic number, because the mean of its divisors is an integer number (5535000).

Almost surely, 2^65513211 is an apocalyptic number.

65513211 is a deficient number, since it is larger than the sum of its proper divisors (23046789).

65513211 is a wasteful number, since it uses less digits than its factorization.

65513211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018.

The product of its digits is 900, while the sum is 24.

The square root of 65513211 is about 8094.0231652745. The cubic root of 65513211 is about 403.1279982230.

Adding to 65513211 its reverse (11231556), we get a palindrome (76744767).

The spelling of 65513211 in words is "sixty-five million, five hundred thirteen thousand, two hundred eleven".