65235521 has 16 divisors (see below), whose sum is σ = 73799040. Its totient is φ = 57554640.

The previous prime is 65235517. The next prime is 65235523. The reversal of 65235521 is 12553256.

It is a happy number.

65235521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65235521 - 2² = 65235517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65235523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49886 + ... + 51176.

It is an arithmetic number, because the mean of its divisors is an integer number (4612440).

Almost surely, 2^65235521 is an apocalyptic number.

It is an amenable number.

65235521 is a deficient number, since it is larger than the sum of its proper divisors (8563519).

65235521 is a wasteful number, since it uses less digits than its factorization.

65235521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353 (or 1327 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 65235521 is about 8076.8509333774. The cubic root of 65235521 is about 402.5576137581.

Adding to 65235521 its reverse (12553256), we get a palindrome (77788777).

It can be divided in two parts, 65235 and 521, that added together give a palindrome (65756).

The spelling of 65235521 in words is "sixty-five million, two hundred thirty-five thousand, five hundred twenty-one".