320435631 has 12 divisors (see below), whose sum is σ = 463152352. Its totient is φ = 213484896.

The previous prime is 320435593. The next prime is 320435639. The reversal of 320435631 is 136534023.

It is a happy number.

320435631 is a `hidden beast` number, since 3 + 20 + 4 + 3 + 5 + 631 = 666.

It is not a de Polignac number, because 320435631 - 2¹⁰ = 320434607 is a prime.

It is a super-2 number, since 2×320435631² = 205357987228736322, 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 = 320435595 and 320435604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320435639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4170 + ... + 25656.

Almost surely, 2^320435631 is an apocalyptic number.

320435631 is a deficient number, since it is larger than the sum of its proper divisors (142716721).

320435631 is a wasteful number, since it uses less digits than its factorization.

320435631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23150 (or 23147 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 320435631 is about 17900.7159354033. The cubic root of 320435631 is about 684.3006206524.

Adding to 320435631 its reverse (136534023), we get a palindrome (456969654).

The spelling of 320435631 in words is "three hundred twenty million, four hundred thirty-five thousand, six hundred thirty-one".