55130222500 has 30 divisors (see below), whose sum is σ = 120558776030. Its totient is φ = 22052088000.

The previous prime is 55130222491. The next prime is 55130222519. The reversal of 55130222500 is 522203155.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 24278002596 + 30852219904 = 155814^2 + 175648^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11023545 + ... + 11028544.

Almost surely, 2^55130222500 is an apocalyptic number.

55130222500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55130222500 is an abundant number, since it is smaller than the sum of its proper divisors (65428553530).

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

55130222500 is a wasteful number, since it uses less digits than its factorization.

55130222500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22052113 (or 22052096 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 55130222500 its reverse (522203155), we get a palindrome (55652425655).

The spelling of 55130222500 in words is "fifty-five billion, one hundred thirty million, two hundred twenty-two thousand, five hundred".