320765631 has 8 divisors (see below), whose sum is σ = 427832880. Its totient is φ = 213771072.

The previous prime is 320765629. The next prime is 320765651. The reversal of 320765631 is 136567023.

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

It is not a de Polignac number, because 320765631 - 2¹ = 320765629 is a prime.

It is a super-2 number, since 2×320765631² = 205781180061656322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320765592 and 320765601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320765611) 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, 6870 + ... + 26243.

It is an arithmetic number, because the mean of its divisors is an integer number (53479110).

Almost surely, 2^320765631 is an apocalyptic number.

320765631 is a deficient number, since it is larger than the sum of its proper divisors (107067249).

320765631 is a wasteful number, since it uses less digits than its factorization.

320765631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36345.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 320765631 is about 17909.9310718942. The cubic root of 320765631 is about 684.5354486048.

The spelling of 320765631 in words is "three hundred twenty million, seven hundred sixty-five thousand, six hundred thirty-one".