55520800 has 36 divisors (see below), whose sum is σ = 135542106. Its totient is φ = 22208000.

The previous prime is 55520791. The next prime is 55520851. The reversal of 55520800 is 802555.

It can be written as a sum of positive squares in 3 ways, for example, as 44997264 + 10523536 = 6708^2 + 3244^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33901 + ... + 35500.

Almost surely, 2^55520800 is an apocalyptic number.

55520800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55520800 is an abundant number, since it is smaller than the sum of its proper divisors (80021306).

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

55520800 is a wasteful number, since it uses less digits than its factorization.

55520800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69421 (or 69408 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 55520800 is about 7451.2280866982. The cubic root of 55520800 is about 381.4918272267.

The spelling of 55520800 in words is "fifty-five million, five hundred twenty thousand, eight hundred".