2311020320 has 72 divisors (see below), whose sum is σ = 6351200604. Its totient is φ = 792347136.

The previous prime is 2311020317. The next prime is 2311020323. The reversal of 2311020320 is 230201132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2311020317) and next prime (2311020323).

It can be written as a sum of positive squares in 2 ways, for example, as 2231239696 + 79780624 = 47236^2 + 8932^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2311020295 and 2311020304.

It is not an unprimeable number, because it can be changed into a prime (2311020323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139547 + ... + 155226.

Almost surely, 2^2311020320 is an apocalyptic number.

2311020320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311020320 is an abundant number, since it is smaller than the sum of its proper divisors (4040180284).

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

2311020320 is a wasteful number, since it uses less digits than its factorization.

2311020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294802 (or 294787 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2311020320 is about 48073.0727122783. The cubic root of 2311020320 is about 1322.1110084596. Note that the first 3 decimals are identical.

Adding to 2311020320 its reverse (230201132), we get a palindrome (2541221452).

The spelling of 2311020320 in words is "two billion, three hundred eleven million, twenty thousand, three hundred twenty".