55207800 has 72 divisors (see below), whose sum is σ = 185412240. Its totient is φ = 14721600.

The previous prime is 55207777. The next prime is 55207813. The reversal of 55207800 is 870255.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13536 + ... + 17135.

It is an arithmetic number, because the mean of its divisors is an integer number (2575170).

Almost surely, 2^55207800 is an apocalyptic number.

55207800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55207800 is an abundant number, since it is smaller than the sum of its proper divisors (130204440).

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

55207800 is a wasteful number, since it uses less digits than its factorization.

55207800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30693 (or 30681 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 55207800 is about 7430.1951522150. The cubic root of 55207800 is about 380.7735856911.

The spelling of 55207800 in words is "fifty-five million, two hundred seven thousand, eight hundred".