113211231 has 16 divisors (see below), whose sum is σ = 177176064. Its totient is φ = 62943264.

The previous prime is 113211169. The next prime is 113211257. The reversal of 113211231 is 132112311.

It is a happy number.

It is not a de Polignac number, because 113211231 - 2⁶ = 113211167 is a prime.

It is a super-2 number, since 2×113211231² = 25633565649070722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 113211231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113211031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72075 + ... + 73628.

It is an arithmetic number, because the mean of its divisors is an integer number (11073504).

Almost surely, 2^113211231 is an apocalyptic number.

113211231 is a deficient number, since it is larger than the sum of its proper divisors (63964833).

113211231 is a wasteful number, since it uses less digits than its factorization.

113211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145750.

The product of its digits is 36, while the sum is 15.

The square root of 113211231 is about 10640.0766444608. The cubic root of 113211231 is about 483.7598685299.

Adding to 113211231 its reverse (132112311), we get a palindrome (245323542).

The spelling of 113211231 in words is "one hundred thirteen million, two hundred eleven thousand, two hundred thirty-one".