55520053400 has 192 divisors, whose sum is σ = 152909856000. Its totient is φ = 18343180800.

The previous prime is 55520053367. The next prime is 55520053411. The reversal of 55520053400 is 435002555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28053611 + ... + 28055589.

It is an arithmetic number, because the mean of its divisors is an integer number (796405500).

Almost surely, 2^55520053400 is an apocalyptic number.

55520053400 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 55520053400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76454928000).

55520053400 is an abundant number, since it is smaller than the sum of its proper divisors (97389802600).

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

55520053400 is a wasteful number, since it uses less digits than its factorization.

55520053400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722 (or 2713 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 29.

Adding to 55520053400 its reverse (435002555), we get a palindrome (55955055955).

The spelling of 55520053400 in words is "fifty-five billion, five hundred twenty million, fifty-three thousand, four hundred".