131228322 has 32 divisors (see below), whose sum is σ = 267079680. Its totient is φ = 42978000.

The previous prime is 131228311. The next prime is 131228329. The reversal of 131228322 is 223822131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131228292 and 131228301.

It is not an unprimeable number, because it can be changed into a prime (131228329) 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 15 ways as a sum of consecutive naturals, for example, 118423 + ... + 119525.

It is an arithmetic number, because the mean of its divisors is an integer number (8346240).

Almost surely, 2^131228322 is an apocalyptic number.

131228322 is an abundant number, since it is smaller than the sum of its proper divisors (135851358).

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

131228322 is a wasteful number, since it uses less digits than its factorization.

131228322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438.

The product of its digits is 1152, while the sum is 24.

The square root of 131228322 is about 11455.4930928354. The cubic root of 131228322 is about 508.1701978952.

The spelling of 131228322 in words is "one hundred thirty-one million, two hundred twenty-eight thousand, three hundred twenty-two".