320341534204521 has 16 divisors (see below), whose sum is σ = 429105521265408. Its totient is φ = 212569731819600.

The previous prime is 320341534204493. The next prime is 320341534204543. The reversal of 320341534204521 is 125402435143023.

It is a happy number.

It is not a de Polignac number, because 320341534204521 - 2²¹ = 320341532107369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320341534204521.

It is not an unprimeable number, because it can be changed into a prime (320341534204621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52985875 + ... + 58721256.

It is an arithmetic number, because the mean of its divisors is an integer number (26819095079088).

Almost surely, 2^{320341534204521} is an apocalyptic number.

It is an amenable number.

320341534204521 is a deficient number, since it is larger than the sum of its proper divisors (108763987060887).

320341534204521 is a wasteful number, since it uses less digits than its factorization.

320341534204521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111711572.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 320341534204521 its reverse (125402435143023), we get a palindrome (445743969347544).

The spelling of 320341534204521 in words is "three hundred twenty trillion, three hundred forty-one billion, five hundred thirty-four million, two hundred four thousand, five hundred twenty-one".