1100543540 has 48 divisors (see below), whose sum is σ = 2424183552. Its totient is φ = 419193216.

The previous prime is 1100543513. The next prime is 1100543551. The reversal of 1100543540 is 453450011.

It is a super-2 number, since 2×1100543540² = 2422392166871463200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18959 + ... + 50601.

It is an arithmetic number, because the mean of its divisors is an integer number (50503824).

Almost surely, 2^1100543540 is an apocalyptic number.

1100543540 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 1100543540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1212091776).

1100543540 is an abundant number, since it is smaller than the sum of its proper divisors (1323640012).

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

1100543540 is a wasteful number, since it uses less digits than its factorization.

1100543540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31736 (or 31734 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1100543540 is about 33174.4410653744. The cubic root of 1100543540 is about 1032.4501133786.

Adding to 1100543540 its reverse (453450011), we get a palindrome (1553993551).

It can be divided in two parts, 11005 and 43540, that added together give a palindrome (54545).

The spelling of 1100543540 in words is "one billion, one hundred million, five hundred forty-three thousand, five hundred forty".