320215435231 has 8 divisors (see below), whose sum is σ = 322231173264. Its totient is φ = 318202407360.

The previous prime is 320215435187. The next prime is 320215435237. The reversal of 320215435231 is 132534512023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320215435231 - 2²¹ = 320213338079 is a prime.

It is a super-2 number, since 2×320215435231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

320215435231 is a modest number, since divided by 435231 gives 320215 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 320215435193 and 320215435202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320215435237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440230 + ... + 913363.

It is an arithmetic number, because the mean of its divisors is an integer number (40278896658).

Almost surely, 2^320215435231 is an apocalyptic number.

320215435231 is a deficient number, since it is larger than the sum of its proper divisors (2015738033).

320215435231 is a wasteful number, since it uses less digits than its factorization.

320215435231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355081.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 320215435231 its reverse (132534512023), we get a palindrome (452749947254).

The spelling of 320215435231 in words is "three hundred twenty billion, two hundred fifteen million, four hundred thirty-five thousand, two hundred thirty-one".