2131132231 has 4 divisors (see below), whose sum is σ = 2199878464. Its totient is φ = 2062386000.

The previous prime is 2131132217. The next prime is 2131132259. The reversal of 2131132231 is 1322311312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131132231 is a prime.

It is a super-2 number, since 2×2131132231² = 9083449172014074722, 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 = 2131132199 and 2131132208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131132271) 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, 34373070 + ... + 34373131.

It is an arithmetic number, because the mean of its divisors is an integer number (549969616).

Almost surely, 2^2131132231 is an apocalyptic number.

2131132231 is a deficient number, since it is larger than the sum of its proper divisors (68746233).

2131132231 is an equidigital number, since it uses as much as digits as its factorization.

2131132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68746232.

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

The square root of 2131132231 is about 46164.1877541455. The cubic root of 2131132231 is about 1286.8762894242.

Adding to 2131132231 its reverse (1322311312), we get a palindrome (3453443543).

The spelling of 2131132231 in words is "two billion, one hundred thirty-one million, one hundred thirty-two thousand, two hundred thirty-one".