55207900 has 72 divisors (see below), whose sum is σ = 134991360. Its totient is φ = 19416000.

The previous prime is 55207883. The next prime is 55207903. The reversal of 55207900 is 970255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55207903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33291 + ... + 34909.

It is an arithmetic number, because the mean of its divisors is an integer number (1874880).

Almost surely, 2^55207900 is an apocalyptic number.

55207900 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 55207900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67495680).

55207900 is an abundant number, since it is smaller than the sum of its proper divisors (79783460).

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

55207900 is a wasteful number, since it uses less digits than its factorization.

55207900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 1668 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 55207900 is about 7430.2018815104. The cubic root of 55207900 is about 380.7738155942.

The spelling of 55207900 in words is "fifty-five million, two hundred seven thousand, nine hundred".