55009100 has 36 divisors (see below), whose sum is σ = 124564944. Its totient is φ = 21046080.

The previous prime is 55009099. The next prime is 55009103. The reversal of 55009100 is 190055.

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

It is not an unprimeable number, because it can be changed into a prime (55009103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9659 + ... + 14258.

Almost surely, 2^55009100 is an apocalyptic number.

55009100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55009100 is an abundant number, since it is smaller than the sum of its proper divisors (69555844).

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

55009100 is a wasteful number, since it uses less digits than its factorization.

55009100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23954 (or 23947 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 55009100 is about 7416.8119835951. The cubic root of 55009100 is about 380.3162187785.

Adding to 55009100 its reverse (190055), we get a palindrome (55199155).

The spelling of 55009100 in words is "fifty-five million, nine thousand, one hundred".