131213223 has 8 divisors (see below), whose sum is σ = 194390000. Its totient is φ = 87475464.

The previous prime is 131213177. The next prime is 131213249. The reversal of 131213223 is 322312131.

It is not a de Polignac number, because 131213223 - 2¹⁰ = 131212199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131213196 and 131213205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131213723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2429848 + ... + 2429901.

It is an arithmetic number, because the mean of its divisors is an integer number (24298750).

Almost surely, 2^131213223 is an apocalyptic number.

131213223 is a deficient number, since it is larger than the sum of its proper divisors (63176777).

131213223 is an equidigital number, since it uses as much as digits as its factorization.

131213223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859758 (or 4859752 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 131213223 is about 11454.8340450659. The cubic root of 131213223 is about 508.1507072954.

Adding to 131213223 its reverse (322312131), we get a palindrome (453525354).

It can be divided in two parts, 1312 and 13223, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 131213223 in words is "one hundred thirty-one million, two hundred thirteen thousand, two hundred twenty-three".