131023228 has 12 divisors (see below), whose sum is σ = 262046512. Its totient is φ = 56152800.

The previous prime is 131023223. The next prime is 131023229. The reversal of 131023228 is 822320131.

131023228 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 131023199 and 131023208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131023223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2339673 + ... + 2339728.

Almost surely, 2^131023228 is an apocalyptic number.

It is an amenable number.

131023228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131023228 is a wasteful number, since it uses less digits than its factorization.

131023228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679412 (or 4679410 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 131023228 is about 11446.5378171742. The cubic root of 131023228 is about 507.9053236669.

Adding to 131023228 its reverse (822320131), we get a palindrome (953343359).

The spelling of 131023228 in words is "one hundred thirty-one million, twenty-three thousand, two hundred twenty-eight".