320231533006553 has 6 divisors (see below), whose sum is σ = 372514232272986. Its totient is φ = 274484171148432.

The previous prime is 320231533006421. The next prime is 320231533006621. The reversal of 320231533006553 is 355600335132023.

It can be written as a sum of positive squares in only one way, i.e., 302502986967769 + 17728546038784 = 17392613^2 + 4210528^2 .

It is not a de Polignac number, because 320231533006553 - 2¹⁴ = 320231532990169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320231533006553.

It is not an unprimeable number, because it can be changed into a prime (320231533006153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3267668704100 + ... + 3267668704197.

It is an arithmetic number, because the mean of its divisors is an integer number (62085705378831).

Almost surely, 2^{320231533006553} is an apocalyptic number.

It is an amenable number.

320231533006553 is a deficient number, since it is larger than the sum of its proper divisors (52282699266433).

320231533006553 is an equidigital number, since it uses as much as digits as its factorization.

320231533006553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535337408311 (or 6535337408304 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 41.

Adding to 320231533006553 its reverse (355600335132023), we get a palindrome (675831868138576).

The spelling of 320231533006553 in words is "three hundred twenty trillion, two hundred thirty-one billion, five hundred thirty-three million, six thousand, five hundred fifty-three".