55011100 has 18 divisors (see below), whose sum is σ = 119374304. Its totient is φ = 22004400.

The previous prime is 55011091. The next prime is 55011109. The reversal of 55011100 is 111055.

It is an interprime number because it is at equal distance from previous prime (55011091) and next prime (55011109).

It is a super-2 number, since 2×55011100² = 6052442246420000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55011109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 274956 + ... + 275155.

Almost surely, 2^55011100 is an apocalyptic number.

55011100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55011100 is an abundant number, since it is smaller than the sum of its proper divisors (64363204).

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

55011100 is a wasteful number, since it uses less digits than its factorization.

55011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550125 (or 550118 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 55011100 is about 7416.9468111885. The cubic root of 55011100 is about 380.3208278536.

Adding to 55011100 its reverse (111055), we get a palindrome (55122155).

It can be divided in two parts, 5 and 5011100, that added together give a palindrome (5011105).

The spelling of 55011100 in words is "fifty-five million, eleven thousand, one hundred".