131211223 has 16 divisors (see below), whose sum is σ = 154498176. Its totient is φ = 109859040.

The previous prime is 131211181. The next prime is 131211229. The reversal of 131211223 is 322112131.

It is a cyclic number.

It is not a de Polignac number, because 131211223 - 2²¹ = 129114071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131211197 and 131211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211229) 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, 91236 + ... + 92662.

It is an arithmetic number, because the mean of its divisors is an integer number (9656136).

Almost surely, 2^131211223 is an apocalyptic number.

131211223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131211223 is a deficient number, since it is larger than the sum of its proper divisors (23286953).

131211223 is a wasteful number, since it uses less digits than its factorization.

131211223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094.

The product of its digits is 72, while the sum is 16.

The square root of 131211223 is about 11454.7467453454. The cubic root of 131211223 is about 508.1481254759.

Adding to 131211223 its reverse (322112131), we get a palindrome (453323354).

The spelling of 131211223 in words is "one hundred thirty-one million, two hundred eleven thousand, two hundred twenty-three".