131311233 has 16 divisors (see below), whose sum is σ = 199281600. Its totient is φ = 85404960.

The previous prime is 131311199. The next prime is 131311241. The reversal of 131311233 is 332113131.

It is a happy number.

It is not a de Polignac number, because 131311233 - 2¹⁰ = 131310209 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 58203 + ... + 60416.

It is an arithmetic number, because the mean of its divisors is an integer number (12455100).

Almost surely, 2^131311233 is an apocalyptic number.

It is an amenable number.

131311233 is a deficient number, since it is larger than the sum of its proper divisors (67970367).

131311233 is a wasteful number, since it uses less digits than its factorization.

131311233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118669 (or 118663 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 131311233 is about 11459.1113529802. Note that the first 3 decimals coincide. The cubic root of 131311233 is about 508.2771972290.

Adding to 131311233 its reverse (332113131), we get a palindrome (463424364).

It can be divided in two parts, 131 and 311233, that added together give a square (311364 = 558²).

The spelling of 131311233 in words is "one hundred thirty-one million, three hundred eleven thousand, two hundred thirty-three".