2311320505 has 32 divisors (see below), whose sum is σ = 3036507264. Its totient is φ = 1678688256.

The previous prime is 2311320497. The next prime is 2311320521. The reversal of 2311320505 is 5050231132.

It is a cyclic number.

It is not a de Polignac number, because 2311320505 - 2³ = 2311320497 is a prime.

It is a super-3 number, since 3×2311320505³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1385682 + ... + 1387348.

It is an arithmetic number, because the mean of its divisors is an integer number (94890852).

Almost surely, 2^2311320505 is an apocalyptic number.

It is an amenable number.

2311320505 is a deficient number, since it is larger than the sum of its proper divisors (725186759).

2311320505 is a wasteful number, since it uses less digits than its factorization.

2311320505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2311320505 is about 48076.1947849453. The cubic root of 2311320505 is about 1322.1682502339.

Adding to 2311320505 its reverse (5050231132), we get a palindrome (7361551637).

The spelling of 2311320505 in words is "two billion, three hundred eleven million, three hundred twenty thousand, five hundred five".