320720230131 has 12 divisors (see below), whose sum is σ = 497443622472. Its totient is φ = 183268702848.

The previous prime is 320720230087. The next prime is 320720230133. The reversal of 320720230131 is 131032027023.

It is not a de Polignac number, because 320720230131 - 2¹⁹ = 320719705843 is a prime.

It is a super-2 number, since 2×320720230131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320720230133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1090884990 + ... + 1090885283.

It is an arithmetic number, because the mean of its divisors is an integer number (41453635206).

Almost surely, 2^320720230131 is an apocalyptic number.

320720230131 is a deficient number, since it is larger than the sum of its proper divisors (176723392341).

320720230131 is a wasteful number, since it uses less digits than its factorization.

320720230131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181770290 (or 2181770283 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

Adding to 320720230131 its reverse (131032027023), we get a palindrome (451752257154).

The spelling of 320720230131 in words is "three hundred twenty billion, seven hundred twenty million, two hundred thirty thousand, one hundred thirty-one".