55540030 has 48 divisors (see below), whose sum is σ = 125254080. Its totient is φ = 17575488.

The previous prime is 55540027. The next prime is 55540039. The reversal of 55540030 is 3004555.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55539983 and 55540010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55540039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2011 + ... + 10729.

It is an arithmetic number, because the mean of its divisors is an integer number (2609460).

Almost surely, 2^55540030 is an apocalyptic number.

55540030 is an abundant number, since it is smaller than the sum of its proper divisors (69714050).

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

55540030 is a wasteful number, since it uses less digits than its factorization.

55540030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8753 (or 8746 counting only the distinct ones).

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

The square root of 55540030 is about 7452.5183662974. The cubic root of 55540030 is about 381.5358662237.

Adding to 55540030 its reverse (3004555), we get a palindrome (58544585).

The spelling of 55540030 in words is "fifty-five million, five hundred forty thousand, thirty".