2131406323 has 4 divisors (see below), whose sum is σ = 2132202240. Its totient is φ = 2130610408.

The previous prime is 2131406239. The next prime is 2131406351. The reversal of 2131406323 is 3236041312.

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-2131406323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131406353) 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, 393928 + ... + 399301.

It is an arithmetic number, because the mean of its divisors is an integer number (533050560).

Almost surely, 2^2131406323 is an apocalyptic number.

2131406323 is a deficient number, since it is larger than the sum of its proper divisors (795917).

2131406323 is an equidigital number, since it uses as much as digits as its factorization.

2131406323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795916.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 2131406323 is about 46167.1563235164. The cubic root of 2131406323 is about 1286.9314568716.

Adding to 2131406323 its reverse (3236041312), we get a palindrome (5367447635).

The spelling of 2131406323 in words is "two billion, one hundred thirty-one million, four hundred six thousand, three hundred twenty-three".