2311321512 has 32 divisors (see below), whose sum is σ = 5864551200. Its totient is φ = 758940864.

The previous prime is 2311321511. The next prime is 2311321561. The reversal of 2311321512 is 2151231132.

It is a super-2 number, since 2×2311321512² = 10684414263667932288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2311321511) 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 7 ways as a sum of consecutive naturals, for example, 717087 + ... + 720302.

It is an arithmetic number, because the mean of its divisors is an integer number (183267225).

Almost surely, 2^2311321512 is an apocalyptic number.

It is an amenable number.

2311321512 is an abundant number, since it is smaller than the sum of its proper divisors (3553229688).

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

2311321512 is a wasteful number, since it uses less digits than its factorization.

2311321512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437465 (or 1437461 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 2311321512 is about 48076.2052579028. The cubic root of 2311321512 is about 1322.1684422487.

Adding to 2311321512 its reverse (2151231132), we get a palindrome (4462552644).

The spelling of 2311321512 in words is "two billion, three hundred eleven million, three hundred twenty-one thousand, five hundred twelve".