55210320000 has 480 divisors, whose sum is σ = 216607350960. Its totient is φ = 13382400000.

The previous prime is 55210319981. The next prime is 55210320019. The reversal of 55210320000 is 2301255.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55210319981) and next prime (55210320019).

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 7916515 + ... + 7923485.

Almost surely, 2^55210320000 is an apocalyptic number.

55210320000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55210320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108303675480).

55210320000 is an abundant number, since it is smaller than the sum of its proper divisors (161397030960).

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

55210320000 is a wasteful number, since it uses less digits than its factorization.

55210320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022 (or 6992 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

Adding to 55210320000 its reverse (2301255), we get a palindrome (55212621255).

The spelling of 55210320000 in words is "fifty-five billion, two hundred ten million, three hundred twenty thousand".