55103420 has 24 divisors (see below), whose sum is σ = 121808400. Its totient is φ = 20881152.

The previous prime is 55103381. The next prime is 55103431. The reversal of 55103420 is 2430155.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 55103392 and 55103401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72125 + ... + 72884.

It is an arithmetic number, because the mean of its divisors is an integer number (5075350).

Almost surely, 2^55103420 is an apocalyptic number.

It is an amenable number.

55103420 is an abundant number, since it is smaller than the sum of its proper divisors (66704980).

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

55103420 is a wasteful number, since it uses less digits than its factorization.

55103420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145037 (or 145035 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 55103420 is about 7423.1677874072. The cubic root of 55103420 is about 380.5334612787.

Adding to 55103420 its reverse (2430155), we get a palindrome (57533575).

The spelling of 55103420 in words is "fifty-five million, one hundred three thousand, four hundred twenty".