2131033231 has 4 divisors (see below), whose sum is σ = 2165968264. Its totient is φ = 2096098200.

The previous prime is 2131033193. The next prime is 2131033271. The reversal of 2131033231 is 1323301312.

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-2131033231 is a prime.

It is a super-2 number, since 2×2131033231² = 9082605263252598722, 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 = 2131033199 and 2131033208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131033271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17467425 + ... + 17467546.

It is an arithmetic number, because the mean of its divisors is an integer number (541492066).

Almost surely, 2^2131033231 is an apocalyptic number.

2131033231 is a deficient number, since it is larger than the sum of its proper divisors (34935033).

2131033231 is an equidigital number, since it uses as much as digits as its factorization.

2131033231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34935032.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 2131033231 is about 46163.1154819516. The cubic root of 2131033231 is about 1286.8563621881.

Adding to 2131033231 its reverse (1323301312), we get a palindrome (3454334543).

The spelling of 2131033231 in words is "two billion, one hundred thirty-one million, thirty-three thousand, two hundred thirty-one".