320542530 has 64 divisors (see below), whose sum is σ = 959136768. Its totient is φ = 66605760.

The previous prime is 320542517. The next prime is 320542543. The reversal of 320542530 is 35245023.

It is an interprime number because it is at equal distance from previous prime (320542517) and next prime (320542543).

It is a self number, because there is not a number n which added to its sum of digits gives 320542530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67072 + ... + 71691.

It is an arithmetic number, because the mean of its divisors is an integer number (14986512).

Almost surely, 2^320542530 is an apocalyptic number.

320542530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320542530 is an abundant number, since it is smaller than the sum of its proper divisors (638594238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320542530 is a wasteful number, since it uses less digits than its factorization.

320542530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138791.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 320542530 is about 17903.7015725799. The cubic root of 320542530 is about 684.3767076123.

Adding to 320542530 its reverse (35245023), we get a palindrome (355787553).

The spelling of 320542530 in words is "three hundred twenty million, five hundred forty-two thousand, five hundred thirty".