320312311 has 16 divisors (see below), whose sum is σ = 357758208. Its totient is φ = 284334400.

The previous prime is 320312299. The next prime is 320312353. The reversal of 320312311 is 113213023.

It is a cyclic number.

It is not a de Polignac number, because 320312311 - 2²¹ = 318215159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320312411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81651 + ... + 85483.

It is an arithmetic number, because the mean of its divisors is an integer number (22359888).

Almost surely, 2^320312311 is an apocalyptic number.

320312311 is a deficient number, since it is larger than the sum of its proper divisors (37445897).

320312311 is a wasteful number, since it uses less digits than its factorization.

320312311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 320312311 is about 17897.2710489616. The cubic root of 320312311 is about 684.2128247768.

Adding to 320312311 its reverse (113213023), we get a palindrome (433525334).

The spelling of 320312311 in words is "three hundred twenty million, three hundred twelve thousand, three hundred eleven".