55211012520 has 128 divisors (see below), whose sum is σ = 168099891840. Its totient is φ = 14504140800.

The previous prime is 55211012491. The next prime is 55211012539. The reversal of 55211012520 is 2521011255.

55211012520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8555295 + ... + 8561745.

It is an arithmetic number, because the mean of its divisors is an integer number (1313280405).

Almost surely, 2^55211012520 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 55211012520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84049945920).

55211012520 is an abundant number, since it is smaller than the sum of its proper divisors (112888879320).

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

55211012520 is a wasteful number, since it uses less digits than its factorization.

55211012520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515 (or 7511 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 55211012520 its reverse (2521011255), we get a palindrome (57732023775).

The spelling of 55211012520 in words is "fifty-five billion, two hundred eleven million, twelve thousand, five hundred twenty".