320220355 has 48 divisors (see below), whose sum is σ = 486984960. Its totient is φ = 197817984.

The previous prime is 320220343. The next prime is 320220371. The reversal of 320220355 is 553022023.

It is not a de Polignac number, because 320220355 - 2⁹ = 320219843 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 253716 + ... + 254974.

It is an arithmetic number, because the mean of its divisors is an integer number (10145520).

Almost surely, 2^320220355 is an apocalyptic number.

320220355 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

320220355 is a deficient number, since it is larger than the sum of its proper divisors (166764605).

320220355 is a wasteful number, since it uses less digits than its factorization.

320220355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 320220355 is about 17894.7018695479. The cubic root of 320220355 is about 684.1473433761.

Adding to 320220355 its reverse (553022023), we get a palindrome (873242378).

The spelling of 320220355 in words is "three hundred twenty million, two hundred twenty thousand, three hundred fifty-five".