2131423 has 4 divisors (see below), whose sum is σ = 2435920. Its totient is φ = 1826928.

The previous prime is 2131417. The next prime is 2131427. The reversal of 2131423 is 3241312.

It is a happy number.

2131423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2131423 - 2⁹ = 2130911 is a prime.

It is a super-3 number, since 3×2131423³ = 29048933904833351901, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131397 and 2131406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152238 + ... + 152251.

It is an arithmetic number, because the mean of its divisors is an integer number (608980).

2^2131423 is an apocalyptic number.

2131423 is a deficient number, since it is larger than the sum of its proper divisors (304497).

2131423 is an equidigital number, since it uses as much as digits as its factorization.

2131423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304496.

The product of its digits is 144, while the sum is 16.

The square root of 2131423 is about 1459.9393823033. The cubic root of 2131423 is about 128.6934813357.

Adding to 2131423 its reverse (3241312), we get a palindrome (5372735).

The spelling of 2131423 in words is "two million, one hundred thirty-one thousand, four hundred twenty-three".