320053531231261 has 4 divisors (see below), whose sum is σ = 320053651456000. Its totient is φ = 320053411006524.

The previous prime is 320053531231249. The next prime is 320053531231283. The reversal of 320053531231261 is 162132135350023.

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 a de Polignac number, because none of the positive numbers 2^k-320053531231261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320053531231261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320053531231361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56026611 + ... + 61474288.

It is an arithmetic number, because the mean of its divisors is an integer number (80013412864000).

Almost surely, 2^{320053531231261} is an apocalyptic number.

It is an amenable number.

320053531231261 is a deficient number, since it is larger than the sum of its proper divisors (120224739).

320053531231261 is a wasteful number, since it uses less digits than its factorization.

320053531231261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120224738.

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 320053531231261 its reverse (162132135350023), we get a palindrome (482185666581284).

The spelling of 320053531231261 in words is "three hundred twenty trillion, fifty-three billion, five hundred thirty-one million, two hundred thirty-one thousand, two hundred sixty-one".