55330220242 has 16 divisors (see below), whose sum is σ = 90550828512. Its totient is φ = 25147192320.

The previous prime is 55330220221. The next prime is 55330220249. The reversal of 55330220242 is 24202203355.

It is a happy number.

It is a super-2 number, since 2×55330220242² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55330220242.

It is not an unprimeable number, because it can be changed into a prime (55330220249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55378 + ... + 337234.

It is an arithmetic number, because the mean of its divisors is an integer number (5659426782).

Almost surely, 2^55330220242 is an apocalyptic number.

55330220242 is a deficient number, since it is larger than the sum of its proper divisors (35220608270).

55330220242 is a wasteful number, since it uses less digits than its factorization.

55330220242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290793.

The product of its (nonzero) digits is 14400, while the sum is 28.

Adding to 55330220242 its reverse (24202203355), we get a palindrome (79532423597).

It can be divided in two parts, 55330 and 220242, that added together give a palindrome (275572).

The spelling of 55330220242 in words is "fifty-five billion, three hundred thirty million, two hundred twenty thousand, two hundred forty-two".