55143051100 has 72 divisors (see below), whose sum is σ = 123640086528. Its totient is φ = 21325022400.

The previous prime is 55143051077. The next prime is 55143051107. The reversal of 55143051100 is 115034155.

It is a happy number.

It is a super-2 number, since 2×55143051100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55143051107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3411237 + ... + 3427363.

It is an arithmetic number, because the mean of its divisors is an integer number (1717223424).

Almost surely, 2^55143051100 is an apocalyptic number.

55143051100 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 55143051100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61820043264).

55143051100 is an abundant number, since it is smaller than the sum of its proper divisors (68497035428).

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

55143051100 is a wasteful number, since it uses less digits than its factorization.

55143051100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17275 (or 17268 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 55143051100 its reverse (115034155), we get a palindrome (55258085255).

The spelling of 55143051100 in words is "fifty-five billion, one hundred forty-three million, fifty-one thousand, one hundred".