65481583 has 4 divisors (see below), whose sum is σ = 65551248. Its totient is φ = 65411920.

The previous prime is 65481571. The next prime is 65481589. The reversal of 65481583 is 38518456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65481583 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65481589) 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, 33403 + ... + 35308.

It is an arithmetic number, because the mean of its divisors is an integer number (16387812).

Almost surely, 2^65481583 is an apocalyptic number.

65481583 is a deficient number, since it is larger than the sum of its proper divisors (69665).

65481583 is an equidigital number, since it uses as much as digits as its factorization.

65481583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69664.

The product of its digits is 115200, while the sum is 40.

The square root of 65481583 is about 8092.0691420674. The cubic root of 65481583 is about 403.0631146955.

The spelling of 65481583 in words is "sixty-five million, four hundred eighty-one thousand, five hundred eighty-three".