65221250543 has 8 divisors (see below), whose sum is σ = 68861368320. Its totient is φ = 61601874840.

The previous prime is 65221250519. The next prime is 65221250561. The reversal of 65221250543 is 34505212256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65221250543 - 2⁸ = 65221250287 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 (65221250593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5179055 + ... + 5191632.

It is an arithmetic number, because the mean of its divisors is an integer number (8607671040).

Almost surely, 2^65221250543 is an apocalyptic number.

65221250543 is a deficient number, since it is larger than the sum of its proper divisors (3640117777).

65221250543 is a wasteful number, since it uses less digits than its factorization.

65221250543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10371037.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 65221250543 its reverse (34505212256), we get a palindrome (99726462799).

The spelling of 65221250543 in words is "sixty-five billion, two hundred twenty-one million, two hundred fifty thousand, five hundred forty-three".