113131224 has 24 divisors (see below), whose sum is σ = 306397260. Its totient is φ = 37710384.

The previous prime is 113131223. The next prime is 113131229. The reversal of 113131224 is 422131311.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 113131197 and 113131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113131223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 785562 + ... + 785705.

Almost surely, 2^113131224 is an apocalyptic number.

It is an amenable number.

113131224 is an abundant number, since it is smaller than the sum of its proper divisors (193266036).

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

113131224 is a wasteful number, since it uses less digits than its factorization.

113131224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571279 (or 1571272 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 113131224 is about 10636.3162796149. The cubic root of 113131224 is about 483.6458830871.

Adding to 113131224 its reverse (422131311), we get a palindrome (535262535).

The spelling of 113131224 in words is "one hundred thirteen million, one hundred thirty-one thousand, two hundred twenty-four".