320113445 has 8 divisors (see below), whose sum is σ = 393505560. Its totient is φ = 249844480.

The previous prime is 320113441. The next prime is 320113499. The reversal of 320113445 is 544311023.

It can be written as a sum of positive squares in 4 ways, for example, as 1240996 + 318872449 = 1114^2 + 17857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320113445 - 2² = 320113441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320113445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320113441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780560 + ... + 780969.

It is an arithmetic number, because the mean of its divisors is an integer number (49188195).

Almost surely, 2^320113445 is an apocalyptic number.

It is an amenable number.

320113445 is a deficient number, since it is larger than the sum of its proper divisors (73392115).

320113445 is a wasteful number, since it uses less digits than its factorization.

320113445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561575.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 320113445 is about 17891.7144231625. The cubic root of 320113445 is about 684.0711975464.

Adding to 320113445 its reverse (544311023), we get a palindrome (864424468).

The spelling of 320113445 in words is "three hundred twenty million, one hundred thirteen thousand, four hundred forty-five".