55115320422021 has 8 divisors (see below), whose sum is σ = 73487460963840. Its totient is φ = 36743363414112.

The previous prime is 55115320422007. The next prime is 55115320422053. The reversal of 55115320422021 is 12022402351155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55115320422021 - 2¹⁰ = 55115320420997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55115320429021) 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 7 ways as a sum of consecutive naturals, for example, 45181240 + ... + 46385073.

It is an arithmetic number, because the mean of its divisors is an integer number (9185932620480).

Almost surely, 2^{55115320422021} is an apocalyptic number.

It is an amenable number.

55115320422021 is a deficient number, since it is larger than the sum of its proper divisors (18372140541819).

55115320422021 is a wasteful number, since it uses less digits than its factorization.

55115320422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91766955.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 55115320422021 its reverse (12022402351155), we get a palindrome (67137722773176).

The spelling of 55115320422021 in words is "fifty-five trillion, one hundred fifteen billion, three hundred twenty million, four hundred twenty-two thousand, twenty-one".