320111455 has 4 divisors (see below), whose sum is σ = 384133752. Its totient is φ = 256089160.

The previous prime is 320111453. The next prime is 320111459. The reversal of 320111455 is 554111023.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 320111455 - 2¹ = 320111453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320111453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32011141 + ... + 32011150.

It is an arithmetic number, because the mean of its divisors is an integer number (96033438).

Almost surely, 2^320111455 is an apocalyptic number.

320111455 is a deficient number, since it is larger than the sum of its proper divisors (64022297).

320111455 is an equidigital number, since it uses as much as digits as its factorization.

320111455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64022296.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 320111455 is about 17891.6588107419. The cubic root of 320111455 is about 684.0697800235.

Adding to 320111455 its reverse (554111023), we get a palindrome (874222478).

The spelling of 320111455 in words is "three hundred twenty million, one hundred eleven thousand, four hundred fifty-five".