2231320311 has 16 divisors (see below), whose sum is σ = 3606174720. Its totient is φ = 1352315160.

The previous prime is 2231320283. The next prime is 2231320339. The reversal of 2231320311 is 1130231322.

2231320311 is a `hidden beast` number, since 2 + 2 + 31 + 320 + 311 = 666.

It is an interprime number because it is at equal distance from previous prime (2231320283) and next prime (2231320339).

It is not a de Polignac number, because 2231320311 - 2⁵ = 2231320279 is a prime.

It is a super-3 number, since 3×2231320311³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231320211) 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, 3756135 + ... + 3756728.

It is an arithmetic number, because the mean of its divisors is an integer number (225385920).

Almost surely, 2^2231320311 is an apocalyptic number.

2231320311 is a deficient number, since it is larger than the sum of its proper divisors (1374854409).

2231320311 is a wasteful number, since it uses less digits than its factorization.

2231320311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7512883 (or 7512877 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2231320311 is about 47236.8533139116. The cubic root of 2231320311 is about 1306.7343461650.

Adding to 2231320311 its reverse (1130231322), we get a palindrome (3361551633).

It can be divided in two parts, 22313 and 20311, that added together give a palindrome (42624).

The spelling of 2231320311 in words is "two billion, two hundred thirty-one million, three hundred twenty thousand, three hundred eleven".