55431800 has 48 divisors (see below), whose sum is σ = 131643360. Its totient is φ = 21697280.

The previous prime is 55431769. The next prime is 55431821. The reversal of 55431800 is 813455.

It is a self number, because there is not a number n which added to its sum of digits gives 55431800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6452 + ... + 12348.

It is an arithmetic number, because the mean of its divisors is an integer number (2742570).

Almost surely, 2^55431800 is an apocalyptic number.

55431800 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 55431800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65821680).

55431800 is an abundant number, since it is smaller than the sum of its proper divisors (76211560).

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

55431800 is a wasteful number, since it uses less digits than its factorization.

55431800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960 (or 5951 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 55431800 is about 7445.2535215397. The cubic root of 55431800 is about 381.2878740480.

The spelling of 55431800 in words is "fifty-five million, four hundred thirty-one thousand, eight hundred".