131111423 has 4 divisors (see below), whose sum is σ = 131171040. Its totient is φ = 131051808.

The previous prime is 131111389. The next prime is 131111437. The reversal of 131111423 is 324111131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324111131 = 59 ⋅5493409.

It is a cyclic number.

It is not a de Polignac number, because 131111423 - 2⁶ = 131111359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131111443) 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, 26378 + ... + 30951.

It is an arithmetic number, because the mean of its divisors is an integer number (32792760).

Almost surely, 2^131111423 is an apocalyptic number.

131111423 is a deficient number, since it is larger than the sum of its proper divisors (59617).

131111423 is an equidigital number, since it uses as much as digits as its factorization.

131111423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59616.

The product of its digits is 72, while the sum is 17.

The square root of 131111423 is about 11450.3896440252. The cubic root of 131111423 is about 508.0192593500.

Adding to 131111423 its reverse (324111131), we get a palindrome (455222554).

The spelling of 131111423 in words is "one hundred thirty-one million, one hundred eleven thousand, four hundred twenty-three".