65463521 has 4 divisors (see below), whose sum is σ = 65518272. Its totient is φ = 65408772.

The previous prime is 65463487. The next prime is 65463523. The reversal of 65463521 is 12536456.

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 65463521 - 2¹⁸ = 65201377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65463523) 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, 25541 + ... + 27986.

It is an arithmetic number, because the mean of its divisors is an integer number (16379568).

Almost surely, 2^65463521 is an apocalyptic number.

It is an amenable number.

65463521 is a deficient number, since it is larger than the sum of its proper divisors (54751).

65463521 is a wasteful number, since it uses less digits than its factorization.

65463521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54750.

The product of its digits is 21600, while the sum is 32.

The square root of 65463521 is about 8090.9530340993. The cubic root of 65463521 is about 403.0260518802.

Adding to 65463521 its reverse (12536456), we get a palindrome (77999977).

The spelling of 65463521 in words is "sixty-five million, four hundred sixty-three thousand, five hundred twenty-one".