320781141 has 28 divisors (see below), whose sum is σ = 484767360. Its totient is φ = 212158440.

The previous prime is 320781137. The next prime is 320781179. The reversal of 320781141 is 141187023.

It is not a de Polignac number, because 320781141 - 2² = 320781137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320781101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 93820 + ... + 97178.

It is an arithmetic number, because the mean of its divisors is an integer number (17313120).

Almost surely, 2^320781141 is an apocalyptic number.

It is an amenable number.

320781141 is a deficient number, since it is larger than the sum of its proper divisors (163986219).

320781141 is an equidigital number, since it uses as much as digits as its factorization.

320781141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508 (or 3493 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 320781141 is about 17910.3640666515. The cubic root of 320781141 is about 684.5464815550.

It can be divided in two parts, 3207 and 81141, that added together give a palindrome (84348).

The spelling of 320781141 in words is "three hundred twenty million, seven hundred eighty-one thousand, one hundred forty-one".