2311323320 has 32 divisors (see below), whose sum is σ = 5219834400. Its totient is φ = 921088128.

The previous prime is 2311323293. The next prime is 2311323323. The reversal of 2311323320 is 233231132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2311323292 and 2311323301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311323323) 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, 96644 + ... + 118163.

It is an arithmetic number, because the mean of its divisors is an integer number (163119825).

Almost surely, 2^2311323320 is an apocalyptic number.

2311323320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311323320 is an abundant number, since it is smaller than the sum of its proper divisors (2908511080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2311323320 is a wasteful number, since it uses less digits than its factorization.

2311323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215087 (or 215083 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 2311323320 is about 48076.2240613799. The cubic root of 2311323320 is about 1322.1687869980.

Adding to 2311323320 its reverse (233231132), we get a palindrome (2544554452).

The spelling of 2311323320 in words is "two billion, three hundred eleven million, three hundred twenty-three thousand, three hundred twenty".