320145530 has 24 divisors (see below), whose sum is σ = 612159228. Its totient is φ = 120524288.

The previous prime is 320145491. The next prime is 320145557. The reversal of 320145530 is 35541023.

It can be written as a sum of positive squares in 6 ways, for example, as 156075049 + 164070481 = 12493^2 + 12809^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320145496 and 320145505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52499 + ... + 58278.

Almost surely, 2^320145530 is an apocalyptic number.

320145530 is a deficient number, since it is larger than the sum of its proper divisors (292013698).

320145530 is a wasteful number, since it uses less digits than its factorization.

320145530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110818 (or 110801 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 320145530 is about 17892.6110447861. The cubic root of 320145530 is about 684.0940516226.

Adding to 320145530 its reverse (35541023), we get a palindrome (355686553).

The spelling of 320145530 in words is "three hundred twenty million, one hundred forty-five thousand, five hundred thirty".