131222133 has 32 divisors (see below), whose sum is σ = 235249920. Its totient is φ = 70571520.

The previous prime is 131222131. The next prime is 131222141. The reversal of 131222133 is 331222131.

It is not a de Polignac number, because 131222133 - 2¹ = 131222131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131222131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17208 + ... + 23633.

It is an arithmetic number, because the mean of its divisors is an integer number (7351560).

Almost surely, 2^131222133 is an apocalyptic number.

It is an amenable number.

131222133 is a deficient number, since it is larger than the sum of its proper divisors (104027787).

131222133 is a wasteful number, since it uses less digits than its factorization.

131222133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40874 (or 40868 counting only the distinct ones).

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

The square root of 131222133 is about 11455.2229572366. Note that the first 3 decimals coincide. The cubic root of 131222133 is about 508.1622089826.

Adding to 131222133 its reverse (331222131), we get a palindrome (462444264).

The spelling of 131222133 in words is "one hundred thirty-one million, two hundred twenty-two thousand, one hundred thirty-three".