55357421100 has 72 divisors (see below), whose sum is σ = 160197694608. Its totient is φ = 14759193600.

The previous prime is 55357421099. The next prime is 55357421107. The reversal of 55357421100 is 112475355.

It is not an unprimeable number, because it can be changed into a prime (55357421107) 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, 1942152 + ... + 1970448.

Almost surely, 2^55357421100 is an apocalyptic number.

55357421100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55357421100 is an abundant number, since it is smaller than the sum of its proper divisors (104840273508).

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

55357421100 is a wasteful number, since it uses less digits than its factorization.

55357421100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34835 (or 34828 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

Adding to 55357421100 its reverse (112475355), we get a palindrome (55469896455).

The spelling of 55357421100 in words is "fifty-five billion, three hundred fifty-seven million, four hundred twenty-one thousand, one hundred".