131311223 has 24 divisors (see below), whose sum is σ = 144566640. Its totient is φ = 119180160.

The previous prime is 131311199. The next prime is 131311241. The reversal of 131311223 is 322113131.

It is not a de Polignac number, because 131311223 - 2¹⁰ = 131310199 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 (131311273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1475363 + ... + 1475451.

It is an arithmetic number, because the mean of its divisors is an integer number (6023610).

Almost surely, 2^131311223 is an apocalyptic number.

131311223 is a deficient number, since it is larger than the sum of its proper divisors (13255417).

131311223 is an equidigital number, since it uses as much as digits as its factorization.

131311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 236 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 131311223 is about 11459.1109166462. The cubic root of 131311223 is about 508.2771843264.

Adding to 131311223 its reverse (322113131), we get a palindrome (453424354).

The spelling of 131311223 in words is "one hundred thirty-one million, three hundred eleven thousand, two hundred twenty-three".