55303620 has 48 divisors (see below), whose sum is σ = 155174208. Its totient is φ = 14716800.

The previous prime is 55303607. The next prime is 55303627. The reversal of 55303620 is 2630355.

It is not an unprimeable number, because it can be changed into a prime (55303627) 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, 52095 + ... + 53145.

It is an arithmetic number, because the mean of its divisors is an integer number (3232796).

Almost surely, 2^55303620 is an apocalyptic number.

It is an amenable number.

55303620 is an abundant number, since it is smaller than the sum of its proper divisors (99870588).

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

55303620 is a wasteful number, since it uses less digits than its factorization.

55303620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 55303620 is about 7436.6403704899. The cubic root of 55303620 is about 380.9937516628.

Adding to 55303620 its reverse (2630355), we get a palindrome (57933975).

The spelling of 55303620 in words is "fifty-five million, three hundred three thousand, six hundred twenty".