113531544 has 160 divisors (see below), whose sum is σ = 368459520. Its totient is φ = 32122656.

The previous prime is 113531533. The next prime is 113531557. The reversal of 113531544 is 445135311.

It is a happy number.

113531544 is a `hidden beast` number, since 113 + 5 + 3 + 1 + 544 = 666.

It is a super-2 number, since 2×113531544² = 25778822966047872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1102197 + ... + 1102299.

It is an arithmetic number, because the mean of its divisors is an integer number (2302872).

Almost surely, 2^113531544 is an apocalyptic number.

113531544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113531544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184229760).

113531544 is an abundant number, since it is smaller than the sum of its proper divisors (254927976).

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

113531544 is an frugal number, since it uses more digits than its factorization.

113531544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 115 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 113531544 is about 10655.1182067587. The cubic root of 113531544 is about 484.2156792093.

Adding to 113531544 its reverse (445135311), we get a palindrome (558666855).

The spelling of 113531544 in words is "one hundred thirteen million, five hundred thirty-one thousand, five hundred forty-four".