131111228 has 24 divisors (see below), whose sum is σ = 233832144. Its totient is φ = 64310400.

The previous prime is 131111221. The next prime is 131111243. The reversal of 131111228 is 822111131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74438 + ... + 76178.

It is an arithmetic number, because the mean of its divisors is an integer number (9743006).

Almost surely, 2^131111228 is an apocalyptic number.

It is an amenable number.

131111228 is a deficient number, since it is larger than the sum of its proper divisors (102720916).

131111228 is a wasteful number, since it uses less digits than its factorization.

131111228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093 (or 2091 counting only the distinct ones).

The product of its digits is 96, while the sum is 20.

The square root of 131111228 is about 11450.3811290280. The cubic root of 131111228 is about 508.0190074935.

Adding to 131111228 its reverse (822111131), we get a palindrome (953222359).

The spelling of 131111228 in words is "one hundred thirty-one million, one hundred eleven thousand, two hundred twenty-eight".