131211423 has 48 divisors (see below), whose sum is σ = 231806016. Its totient is φ = 69811200.

The previous prime is 131211407. The next prime is 131211433. The reversal of 131211423 is 324112131.

131211423 is a `hidden beast` number, since 1 + 31 + 211 + 423 = 666.

It is not a de Polignac number, because 131211423 - 2⁴ = 131211407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131211396 and 131211405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211433) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107565 + ... + 108777.

It is an arithmetic number, because the mean of its divisors is an integer number (4829292).

Almost surely, 2^131211423 is an apocalyptic number.

131211423 is a deficient number, since it is larger than the sum of its proper divisors (100594593).

131211423 is a wasteful number, since it uses less digits than its factorization.

131211423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1341 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 131211423 is about 11454.7554753473. The cubic root of 131211423 is about 508.1483836590.

Adding to 131211423 its reverse (324112131), we get a palindrome (455323554).

The spelling of 131211423 in words is "one hundred thirty-one million, two hundred eleven thousand, four hundred twenty-three".