320544213530131 has 4 divisors (see below), whose sum is σ = 321130217577352. Its totient is φ = 319958209482912.

The previous prime is 320544213530117. The next prime is 320544213530143. The reversal of 320544213530131 is 131035312445023.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320544213530131 is a prime.

It is a super-2 number, since 2×320544213530131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320544213539131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293002022790 + ... + 293002023883.

It is an arithmetic number, because the mean of its divisors is an integer number (80282554394338).

Almost surely, 2^{320544213530131} is an apocalyptic number.

320544213530131 is a deficient number, since it is larger than the sum of its proper divisors (586004047221).

320544213530131 is an equidigital number, since it uses as much as digits as its factorization.

320544213530131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586004047220.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 320544213530131 its reverse (131035312445023), we get a palindrome (451579525975154).

The spelling of 320544213530131 in words is "three hundred twenty trillion, five hundred forty-four billion, two hundred thirteen million, five hundred thirty thousand, one hundred thirty-one".