320831745 has 16 divisors (see below), whose sum is σ = 552818112. Its totient is φ = 157947840.

The previous prime is 320831657. The next prime is 320831801. The reversal of 320831745 is 547138023.

It is not a de Polignac number, because 320831745 - 2¹³ = 320823553 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 822451 + ... + 822840.

It is an arithmetic number, because the mean of its divisors is an integer number (34551132).

Almost surely, 2^320831745 is an apocalyptic number.

It is an amenable number.

320831745 is a deficient number, since it is larger than the sum of its proper divisors (231986367).

320831745 is a wasteful number, since it uses less digits than its factorization.

320831745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645312.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 320831745 is about 17911.7767125431. The cubic root of 320831745 is about 684.5824759495.

Adding to 320831745 its reverse (547138023), we get a palindrome (867969768).

The spelling of 320831745 in words is "three hundred twenty million, eight hundred thirty-one thousand, seven hundred forty-five".