111530540 has 72 divisors (see below), whose sum is σ = 272686176. Its totient is φ = 38156800.

The previous prime is 111530539. The next prime is 111530593. The reversal of 111530540 is 45035111.

It is a super-2 number, since 2×111530540² = 24878122705383200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39785 + ... + 42495.

It is an arithmetic number, because the mean of its divisors is an integer number (3787308).

Almost surely, 2^111530540 is an apocalyptic number.

111530540 is a gapful number since it is divisible by the number (10) 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 111530540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136343088).

111530540 is an abundant number, since it is smaller than the sum of its proper divisors (161155636).

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

111530540 is a wasteful number, since it uses less digits than its factorization.

111530540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759 (or 2746 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 111530540 is about 10560.8020528746. The cubic root of 111530540 is about 481.3540183320.

Adding to 111530540 its reverse (45035111), we get a palindrome (156565651).

The spelling of 111530540 in words is "one hundred eleven million, five hundred thirty thousand, five hundred forty".