55100056 has 32 divisors (see below), whose sum is σ = 113817600. Its totient is φ = 24798240.

The previous prime is 55100039. The next prime is 55100069. The reversal of 55100056 is 65000155.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6025 + ... + 12103.

It is an arithmetic number, because the mean of its divisors is an integer number (3556800).

Almost surely, 2^55100056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55100056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56908800).

55100056 is an abundant number, since it is smaller than the sum of its proper divisors (58717544).

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

55100056 is a wasteful number, since it uses less digits than its factorization.

55100056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199 (or 6195 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55100056 is about 7422.9411960489. The cubic root of 55100056 is about 380.5257174120.

Subtracting 55100056 from its reverse (65000155), we obtain a palindrome (9900099).

The spelling of 55100056 in words is "fifty-five million, one hundred thousand, fifty-six".