131213423 has 16 divisors (see below), whose sum is σ = 145152000. Its totient is φ = 117624480.

The previous prime is 131213417. The next prime is 131213441. The reversal of 131213423 is 324312131.

It is a cyclic number.

It is not a de Polignac number, because 131213423 - 2¹⁸ = 130951279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131213395 and 131213404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131213473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365318 + ... + 365676.

It is an arithmetic number, because the mean of its divisors is an integer number (9072000).

Almost surely, 2^131213423 is an apocalyptic number.

131213423 is a deficient number, since it is larger than the sum of its proper divisors (13938577).

131213423 is a wasteful number, since it uses less digits than its factorization.

131213423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742.

The product of its digits is 432, while the sum is 20.

The square root of 131213423 is about 11454.8427750013. The cubic root of 131213423 is about 508.1509654759.

Adding to 131213423 its reverse (324312131), we get a palindrome (455525554).

The spelling of 131213423 in words is "one hundred thirty-one million, two hundred thirteen thousand, four hundred twenty-three".