131213133 has 6 divisors (see below), whose sum is σ = 189530094. Its totient is φ = 87475416.

The previous prime is 131213129. The next prime is 131213153. The reversal of 131213133 is 331312131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 130576329 + 636804 = 11427^2 + 798^2 .

It is not a de Polignac number, because 131213133 - 2² = 131213129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131213153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7289610 + ... + 7289627.

It is an arithmetic number, because the mean of its divisors is an integer number (31588349).

Almost surely, 2^131213133 is an apocalyptic number.

It is an amenable number.

131213133 is a deficient number, since it is larger than the sum of its proper divisors (58316961).

131213133 is a wasteful number, since it uses less digits than its factorization.

131213133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14579243 (or 14579240 counting only the distinct ones).

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

The square root of 131213133 is about 11454.8301165927. The cubic root of 131213133 is about 508.1505911141.

Adding to 131213133 its reverse (331312131), we get a palindrome (462525264).

The spelling of 131213133 in words is "one hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-three".