55541213220 has 24 divisors (see below), whose sum is σ = 155515397184. Its totient is φ = 14810990176.

The previous prime is 55541213197. The next prime is 55541213263. The reversal of 55541213220 is 2231214555.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 462843384 + ... + 462843503.

It is an arithmetic number, because the mean of its divisors is an integer number (6479808216).

Almost surely, 2^55541213220 is an apocalyptic number.

It is an amenable number.

55541213220 is an abundant number, since it is smaller than the sum of its proper divisors (99974183964).

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

55541213220 is a wasteful number, since it uses less digits than its factorization.

55541213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925686899 (or 925686897 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 55541213220 its reverse (2231214555), we get a palindrome (57772427775).

The spelling of 55541213220 in words is "fifty-five billion, five hundred forty-one million, two hundred thirteen thousand, two hundred twenty".