55421130 has 32 divisors (see below), whose sum is σ = 133358400. Its totient is φ = 14740352.

The previous prime is 55421129. The next prime is 55421143. The reversal of 55421130 is 3112455.

55421130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55421097 and 55421106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10366 + ... + 14774.

It is an arithmetic number, because the mean of its divisors is an integer number (4167450).

Almost surely, 2^55421130 is an apocalyptic number.

55421130 is an abundant number, since it is smaller than the sum of its proper divisors (77937270).

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

55421130 is a wasteful number, since it uses less digits than its factorization.

55421130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 55421130 is about 7444.5369231404. The cubic root of 55421130 is about 381.2634079312.

Adding to 55421130 its reverse (3112455), we get a palindrome (58533585).

The spelling of 55421130 in words is "fifty-five million, four hundred twenty-one thousand, one hundred thirty".