320431353 has 48 divisors (see below), whose sum is σ = 494760000. Its totient is φ = 184060800.

The previous prime is 320431339. The next prime is 320431367. The reversal of 320431353 is 353134023.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (320431339) and next prime (320431367).

It is not a de Polignac number, because 320431353 - 2⁴ = 320431337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320431373) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 641898 + ... + 642396.

It is an arithmetic number, because the mean of its divisors is an integer number (10307500).

Almost surely, 2^320431353 is an apocalyptic number.

320431353 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

320431353 is a deficient number, since it is larger than the sum of its proper divisors (174328647).

320431353 is a wasteful number, since it uses less digits than its factorization.

320431353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 320431353 is about 17900.5964425770. The cubic root of 320431353 is about 684.2975753699.

Adding to 320431353 its reverse (353134023), we get a palindrome (673565376).

The spelling of 320431353 in words is "three hundred twenty million, four hundred thirty-one thousand, three hundred fifty-three".