1113221540 has 96 divisors (see below), whose sum is σ = 2544151680. Its totient is φ = 407586816.

The previous prime is 1113221537. The next prime is 1113221573. The reversal of 1113221540 is 451223111.

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 31 ways as a sum of consecutive naturals, for example, 2937071 + ... + 2937449.

It is an arithmetic number, because the mean of its divisors is an integer number (26501580).

Almost surely, 2^1113221540 is an apocalyptic number.

1113221540 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 1113221540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1272075840).

1113221540 is an abundant number, since it is smaller than the sum of its proper divisors (1430930140).

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

1113221540 is a wasteful number, since it uses less digits than its factorization.

1113221540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1113221540 is about 33364.9747489789. The cubic root of 1113221540 is about 1036.3995132333.

Adding to 1113221540 its reverse (451223111), we get a palindrome (1564444651).

The spelling of 1113221540 in words is "one billion, one hundred thirteen million, two hundred twenty-one thousand, five hundred forty".