320340221125 has 32 divisors (see below), whose sum is σ = 409654653408. Its totient is φ = 249948864000.

The previous prime is 320340221119. The next prime is 320340221137. The reversal of 320340221125 is 521122043023.

It can be written as a sum of positive squares in 16 ways, for example, as 306847307844 + 13492913281 = 553938^2 + 116159^2 .

It is a de Polignac number, because none of the positive numbers 2^k-320340221125 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 320340221125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23552827 + ... + 23566423.

It is an arithmetic number, because the mean of its divisors is an integer number (12801707919).

Almost surely, 2^320340221125 is an apocalyptic number.

It is an amenable number.

320340221125 is a deficient number, since it is larger than the sum of its proper divisors (89314432283).

320340221125 is a wasteful number, since it uses less digits than its factorization.

320340221125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18250 (or 18240 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 320340221125 its reverse (521122043023), we get a palindrome (841462264148).

The spelling of 320340221125 in words is "three hundred twenty billion, three hundred forty million, two hundred twenty-one thousand, one hundred twenty-five".