320144550 has 48 divisors (see below), whose sum is σ = 866140992. Its totient is φ = 77610400.

The previous prime is 320144549. The next prime is 320144557. The reversal of 320144550 is 55441023.

It is a self number, because there is not a number n which added to its sum of digits gives 320144550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320144557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95364 + ... + 98663.

It is an arithmetic number, because the mean of its divisors is an integer number (18044604).

Almost surely, 2^320144550 is an apocalyptic number.

320144550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320144550 is an abundant number, since it is smaller than the sum of its proper divisors (545996442).

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

320144550 is a wasteful number, since it uses less digits than its factorization.

320144550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194053 (or 194048 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 320144550 is about 17892.5836591589. The cubic root of 320144550 is about 684.0933535933.

Adding to 320144550 its reverse (55441023), we get a palindrome (375585573).

The spelling of 320144550 in words is "three hundred twenty million, one hundred forty-four thousand, five hundred fifty".