55211020 has 48 divisors (see below), whose sum is σ = 119750400. Its totient is φ = 21371840.

The previous prime is 55211003. The next prime is 55211027. The reversal of 55211020 is 2011255.

It is a junction number, because it is equal to n+sod(n) for n = 55210985 and 55211003.

It is not an unprimeable number, because it can be changed into a prime (55211027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83451 + ... + 84109.

It is an arithmetic number, because the mean of its divisors is an integer number (2494800).

Almost surely, 2^55211020 is an apocalyptic number.

It is an amenable number.

55211020 is an abundant number, since it is smaller than the sum of its proper divisors (64539380).

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

55211020 is a wasteful number, since it uses less digits than its factorization.

55211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 55211020 is about 7430.4118324626. The cubic root of 55211020 is about 380.7809884319.

Adding to 55211020 its reverse (2011255), we get a palindrome (57222275).

The spelling of 55211020 in words is "fifty-five million, two hundred eleven thousand, twenty".