55621203 has 16 divisors (see below), whose sum is σ = 82232832. Its totient is φ = 33156000.

The previous prime is 55621201. The next prime is 55621211. The reversal of 55621203 is 30212655.

55621203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55621203 - 2¹ = 55621201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55621201) by changing a digit.

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, 11803 + ... + 15828.

It is an arithmetic number, because the mean of its divisors is an integer number (5139552).

Almost surely, 2^55621203 is an apocalyptic number.

55621203 is a deficient number, since it is larger than the sum of its proper divisors (26611629).

55621203 is a wasteful number, since it uses less digits than its factorization.

55621203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27706.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 55621203 is about 7457.9623892857. The cubic root of 55621203 is about 381.7216501536.

Adding to 55621203 its reverse (30212655), we get a palindrome (85833858).

The spelling of 55621203 in words is "fifty-five million, six hundred twenty-one thousand, two hundred three".