55430500 has 48 divisors (see below), whose sum is σ = 123177600. Its totient is φ = 21784800.

The previous prime is 55430491. The next prime is 55430503. The reversal of 55430500 is 503455.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55430503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28561 + ... + 30439.

It is an arithmetic number, because the mean of its divisors is an integer number (2566200).

Almost surely, 2^55430500 is an apocalyptic number.

55430500 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 55430500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61588800).

55430500 is an abundant number, since it is smaller than the sum of its proper divisors (67747100).

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

55430500 is a wasteful number, since it uses less digits than its factorization.

55430500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 55430500 is about 7445.1662170834. The cubic root of 55430500 is about 381.2848933395.

Adding to 55430500 its reverse (503455), we get a palindrome (55933955).

The spelling of 55430500 in words is "fifty-five million, four hundred thirty thousand, five hundred".