320613231 has 8 divisors (see below), whose sum is σ = 427747120. Its totient is φ = 213610752.

The previous prime is 320613229. The next prime is 320613233. The reversal of 320613231 is 132316023.

It is an interprime number because it is at equal distance from previous prime (320613229) and next prime (320613233).

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

It is not a de Polignac number, because 320613231 - 2¹ = 320613229 is a prime.

It is a super-2 number, since 2×320613231² = 205585687784518722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320613198 and 320613207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320613233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27010 + ... + 37023.

It is an arithmetic number, because the mean of its divisors is an integer number (53468390).

Almost surely, 2^320613231 is an apocalyptic number.

320613231 is a deficient number, since it is larger than the sum of its proper divisors (107133889).

320613231 is a wasteful number, since it uses less digits than its factorization.

320613231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65705.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 320613231 is about 17905.6759436777. The cubic root of 320613231 is about 684.4270208116.

Adding to 320613231 its reverse (132316023), we get a palindrome (452929254).

The spelling of 320613231 in words is "three hundred twenty million, six hundred thirteen thousand, two hundred thirty-one".