320546783231 has 4 divisors (see below), whose sum is σ = 320579917512. Its totient is φ = 320513648952.

The previous prime is 320546783209. The next prime is 320546783233. The reversal of 320546783231 is 132387645023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132387645023 = 229 ⋅578111987.

It is a cyclic number.

It is not a de Polignac number, because 320546783231 - 2³⁸ = 45668876287 is a prime.

It is a super-2 number, since 2×320546783231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320546783233) 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, 16552625 + ... + 16571978.

It is an arithmetic number, because the mean of its divisors is an integer number (80144979378).

Almost surely, 2^320546783231 is an apocalyptic number.

320546783231 is a deficient number, since it is larger than the sum of its proper divisors (33134281).

320546783231 is an equidigital number, since it uses as much as digits as its factorization.

320546783231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33134280.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 320546783231 in words is "three hundred twenty billion, five hundred forty-six million, seven hundred eighty-three thousand, two hundred thirty-one".