65312221355 has 16 divisors (see below), whose sum is σ = 78840254880. Its totient is φ = 51939591168.

The previous prime is 65312221301. The next prime is 65312221417. The reversal of 65312221355 is 55312221356.

It is a cyclic number.

It is not a de Polignac number, because 65312221355 - 2²⁴ = 65295444139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2900219 + ... + 2922651.

It is an arithmetic number, because the mean of its divisors is an integer number (4927515930).

Almost surely, 2^65312221355 is an apocalyptic number.

65312221355 is a deficient number, since it is larger than the sum of its proper divisors (13528033525).

65312221355 is a wasteful number, since it uses less digits than its factorization.

65312221355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25870.

The product of its digits is 54000, while the sum is 35.

Subtracting from 65312221355 its reverse (55312221356), we obtain a palindrome (9999999999).

The spelling of 65312221355 in words is "sixty-five billion, three hundred twelve million, two hundred twenty-one thousand, three hundred fifty-five".