131142222 has 12 divisors (see below), whose sum is σ = 284141520. Its totient is φ = 43714068.

The previous prime is 131142211. The next prime is 131142227. The reversal of 131142222 is 222241131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 7285679 = 131142222 / (1 + 3 + 1 + 1 + 4 + 2 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 131142195 and 131142204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131142227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3642822 + ... + 3642857.

It is an arithmetic number, because the mean of its divisors is an integer number (23678460).

Almost surely, 2^131142222 is an apocalyptic number.

131142222 is an abundant number, since it is smaller than the sum of its proper divisors (152999298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131142222 is a wasteful number, since it uses less digits than its factorization.

131142222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7285687 (or 7285684 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 131142222 is about 11451.7344537847. The cubic root of 131142222 is about 508.0590353406.

Adding to 131142222 its reverse (222241131), we get a palindrome (353383353).

The spelling of 131142222 in words is "one hundred thirty-one million, one hundred forty-two thousand, two hundred twenty-two".