55103620 has 48 divisors (see below), whose sum is σ = 135955008. Its totient is φ = 18495360.

The previous prime is 55103551. The next prime is 55103621. The reversal of 55103620 is 2630155.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 55103591 and 55103600.

It is not an unprimeable number, because it can be changed into a prime (55103621) 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, 6774 + ... + 12493.

It is an arithmetic number, because the mean of its divisors is an integer number (2832396).

Almost surely, 2^55103620 is an apocalyptic number.

It is an amenable number.

55103620 is an abundant number, since it is smaller than the sum of its proper divisors (80851388).

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

55103620 is a wasteful number, since it uses less digits than its factorization.

55103620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19300 (or 19298 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 55103620 is about 7423.1812587327. The cubic root of 55103620 is about 380.5339216651.

Adding to 55103620 its reverse (2630155), we get a palindrome (57733775).

The spelling of 55103620 in words is "fifty-five million, one hundred three thousand, six hundred twenty".