55421221353355 has 48 divisors (see below), whose sum is σ = 83355042490272. Its totient is φ = 35017275110400.

The previous prime is 55421221353299. The next prime is 55421221353359. The reversal of 55421221353355 is 55335312212455.

It is not a de Polignac number, because 55421221353355 - 2¹⁹ = 55421220829067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55421221353359) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207118161 + ... + 207385570.

It is an arithmetic number, because the mean of its divisors is an integer number (1736563385214).

Almost surely, 2^{55421221353355} is an apocalyptic number.

55421221353355 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55421221353355 is a deficient number, since it is larger than the sum of its proper divisors (27933821136917).

55421221353355 is a wasteful number, since it uses less digits than its factorization.

55421221353355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414503788 (or 414503777 counting only the distinct ones).

The product of its digits is 2700000, while the sum is 46.

The spelling of 55421221353355 in words is "fifty-five trillion, four hundred twenty-one billion, two hundred twenty-one million, three hundred fifty-three thousand, three hundred fifty-five".