221155054 has 16 divisors (see below), whose sum is σ = 345833856. Its totient is φ = 105948000.

The previous prime is 221155043. The next prime is 221155153. The reversal of 221155054 is 450551122.

221155054 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 11397 + ... + 23920.

It is an arithmetic number, because the mean of its divisors is an integer number (21614616).

Almost surely, 2^221155054 is an apocalyptic number.

221155054 is a deficient number, since it is larger than the sum of its proper divisors (124678802).

221155054 is a wasteful number, since it uses less digits than its factorization.

221155054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35451.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 221155054 is about 14871.2828632906. The cubic root of 221155054 is about 604.7357213788.

The spelling of 221155054 in words is "two hundred twenty-one million, one hundred fifty-five thousand, fifty-four".