55113500 has 96 divisors (see below), whose sum is σ = 132699840. Its totient is φ = 19872000.

The previous prime is 55113449. The next prime is 55113523. The reversal of 55113500 is 531155.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396431 + ... + 396569.

It is an arithmetic number, because the mean of its divisors is an integer number (1382290).

Almost surely, 2^55113500 is an apocalyptic number.

55113500 is a gapful number since it is divisible by the number (50) 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 55113500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66349920).

55113500 is an abundant number, since it is smaller than the sum of its proper divisors (77586340).

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

55113500 is a wasteful number, since it uses less digits than its factorization.

55113500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 55113500 is about 7423.8467117795. The cubic root of 55113500 is about 380.5566633680.

Adding to 55113500 its reverse (531155), we get a palindrome (55644655).

The spelling of 55113500 in words is "fifty-five million, one hundred thirteen thousand, five hundred".