55005221801 has 4 divisors (see below), whose sum is σ = 55136499600. Its totient is φ = 54873944004.

The previous prime is 55005221773. The next prime is 55005221819. The reversal of 55005221801 is 10812250055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55005221801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55005221861) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 65638271 + ... + 65639108.

It is an arithmetic number, because the mean of its divisors is an integer number (13784124900).

Almost surely, 2^55005221801 is an apocalyptic number.

It is an amenable number.

55005221801 is a deficient number, since it is larger than the sum of its proper divisors (131277799).

55005221801 is a wasteful number, since it uses less digits than its factorization.

55005221801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131277798.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 55005221801 its reverse (10812250055), we get a palindrome (65817471856).

The spelling of 55005221801 in words is "fifty-five billion, five million, two hundred twenty-one thousand, eight hundred one".