221054155543 has 16 divisors (see below), whose sum is σ = 248823590400. Its totient is φ = 194852253024.

The previous prime is 221054155507. The next prime is 221054155559. The reversal of 221054155543 is 345551450122.

It is not a de Polignac number, because 221054155543 - 2¹³ = 221054147351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221054150543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438021 + ... + 796222.

It is an arithmetic number, because the mean of its divisors is an integer number (15551474400).

Almost surely, 2^221054155543 is an apocalyptic number.

221054155543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221054155543 is a deficient number, since it is larger than the sum of its proper divisors (27769434857).

221054155543 is a wasteful number, since it uses less digits than its factorization.

221054155543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234878.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 221054155543 in words is "two hundred twenty-one billion, fifty-four million, one hundred fifty-five thousand, five hundred forty-three".