320231442531 has 128 divisors (see below), whose sum is σ = 629693890560. Its totient is φ = 139149964800.

The previous prime is 320231442529. The next prime is 320231442563. The reversal of 320231442531 is 135244132023.

It is not a de Polignac number, because 320231442531 - 2¹ = 320231442529 is a prime.

It is a super-2 number, since 2×320231442531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320231442511) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1190301 + ... + 1434321.

It is an arithmetic number, because the mean of its divisors is an integer number (4919483520).

Almost surely, 2^320231442531 is an apocalyptic number.

320231442531 is a deficient number, since it is larger than the sum of its proper divisors (309462448029).

320231442531 is a wasteful number, since it uses less digits than its factorization.

320231442531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244097.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 320231442531 its reverse (135244132023), we get a palindrome (455475574554).

The spelling of 320231442531 in words is "three hundred twenty billion, two hundred thirty-one million, four hundred forty-two thousand, five hundred thirty-one".