2113312231 has 4 divisors (see below), whose sum is σ = 2143077264. Its totient is φ = 2083547200.

The previous prime is 2113312217. The next prime is 2113312261. The reversal of 2113312231 is 1322133112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2113312231 - 2⁹ = 2113311719 is a prime.

It is a super-2 number, since 2×2113312231² = 8932177171388394722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2113312199 and 2113312208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113312261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14882410 + ... + 14882551.

It is an arithmetic number, because the mean of its divisors is an integer number (535769316).

Almost surely, 2^2113312231 is an apocalyptic number.

2113312231 is a deficient number, since it is larger than the sum of its proper divisors (29765033).

2113312231 is an equidigital number, since it uses as much as digits as its factorization.

2113312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29765032.

The product of its digits is 216, while the sum is 19.

The square root of 2113312231 is about 45970.7758363941. The cubic root of 2113312231 is about 1283.2793983217.

Adding to 2113312231 its reverse (1322133112), we get a palindrome (3435445343).

The spelling of 2113312231 in words is "two billion, one hundred thirteen million, three hundred twelve thousand, two hundred thirty-one".