55215333625205 has 24 divisors (see below), whose sum is σ = 71748116700840. Its totient is φ = 40773914438400.

The previous prime is 55215333625189. The next prime is 55215333625213. The reversal of 55215333625205 is 50252633351255.

It can be written as a sum of positive squares in 12 ways, for example, as 33682225642321 + 21533107982884 = 5803639^2 + 4640378^2 .

It is not a de Polignac number, because 55215333625205 - 2⁴ = 55215333625189 is a prime.

It is a super-2 number, since 2×55215333625205² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55215333625205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80525951 + ... + 81208739.

It is an arithmetic number, because the mean of its divisors is an integer number (2989504862535).

Almost surely, 2^{55215333625205} is an apocalyptic number.

It is an amenable number.

55215333625205 is a deficient number, since it is larger than the sum of its proper divisors (16532783075635).

55215333625205 is a wasteful number, since it uses less digits than its factorization.

55215333625205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778521 (or 778508 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 47.

The spelling of 55215333625205 in words is "fifty-five trillion, two hundred fifteen billion, three hundred thirty-three million, six hundred twenty-five thousand, two hundred five".