65113621 has 16 divisors (see below), whose sum is σ = 72344448. Its totient is φ = 58291200.

The previous prime is 65113561. The next prime is 65113637. The reversal of 65113621 is 12631156.

65113621 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 65113621 - 2⁹ = 65113109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65113691) 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, 93886 + ... + 94576.

It is an arithmetic number, because the mean of its divisors is an integer number (4521528).

Almost surely, 2^65113621 is an apocalyptic number.

It is an amenable number.

65113621 is a deficient number, since it is larger than the sum of its proper divisors (7230827).

65113621 is a wasteful number, since it uses less digits than its factorization.

65113621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its digits is 1080, while the sum is 25.

The square root of 65113621 is about 8069.3011469396. The cubic root of 65113621 is about 402.3067158345.

Adding to 65113621 its reverse (12631156), we get a palindrome (77744777).

The spelling of 65113621 in words is "sixty-five million, one hundred thirteen thousand, six hundred twenty-one".