2131233113 has 4 divisors (see below), whose sum is σ = 2204723940. Its totient is φ = 2057742288.

The previous prime is 2131233109. The next prime is 2131233119. The reversal of 2131233113 is 3113321312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 536987929 + 1594245184 = 23173^2 + 39928^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131233113 - 2² = 2131233109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2131233119) 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, 36745370 + ... + 36745427.

It is an arithmetic number, because the mean of its divisors is an integer number (551180985).

Almost surely, 2^2131233113 is an apocalyptic number.

It is an amenable number.

2131233113 is a deficient number, since it is larger than the sum of its proper divisors (73490827).

2131233113 is an equidigital number, since it uses as much as digits as its factorization.

2131233113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73490826.

The product of its digits is 324, while the sum is 20.

The square root of 2131233113 is about 46165.2803847220. The cubic root of 2131233113 is about 1286.8965948443.

Adding to 2131233113 its reverse (3113321312), we get a palindrome (5244554425).

The spelling of 2131233113 in words is "two billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred thirteen".