111521344 has 42 divisors (see below), whose sum is σ = 243264182. Its totient is φ = 50688000.

The previous prime is 111521323. The next prime is 111521351. The reversal of 111521344 is 443125111.

It can be written as a sum of positive squares in only one way, i.e., 111513600 + 7744 = 10560^2 + 88^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 544 + ... + 14944.

Almost surely, 2^111521344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111521344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121632091).

111521344 is an abundant number, since it is smaller than the sum of its proper divisors (131742838).

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

111521344 is a wasteful number, since it uses less digits than its factorization.

111521344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14435 (or 14414 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 111521344 is about 10560.3666603011. The cubic root of 111521344 is about 481.3407883138.

Adding to 111521344 its reverse (443125111), we get a palindrome (554646455).

The spelling of 111521344 in words is "one hundred eleven million, five hundred twenty-one thousand, three hundred forty-four".