55381273387321 has 32 divisors (see below), whose sum is σ = 65650673088000. Its totient is φ = 46686255013440.

The previous prime is 55381273387313. The next prime is 55381273387369. The reversal of 55381273387321 is 12378337218355.

It is not a de Polignac number, because 55381273387321 - 2³ = 55381273387313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55381273387621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193164351 + ... + 193450843.

It is an arithmetic number, because the mean of its divisors is an integer number (2051583534000).

Almost surely, 2^{55381273387321} is an apocalyptic number.

It is an amenable number.

55381273387321 is a deficient number, since it is larger than the sum of its proper divisors (10269399700679).

55381273387321 is an equidigital number, since it uses as much as digits as its factorization.

55381273387321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295814 (or 295800 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 58.

The spelling of 55381273387321 in words is "fifty-five trillion, three hundred eighty-one billion, two hundred seventy-three million, three hundred eighty-seven thousand, three hundred twenty-one".