221163154 has 16 divisors (see below), whose sum is σ = 354127680. Its totient is φ = 103284720.

The previous prime is 221163121. The next prime is 221163157. The reversal of 221163154 is 451361122.

It is a happy number.

221163154 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221163157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38289 + ... + 43684.

It is an arithmetic number, because the mean of its divisors is an integer number (22132980).

Almost surely, 2^221163154 is an apocalyptic number.

221163154 is a deficient number, since it is larger than the sum of its proper divisors (132964526).

221163154 is a wasteful number, since it uses less digits than its factorization.

221163154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82065.

The product of its digits is 1440, while the sum is 25.

The square root of 221163154 is about 14871.5551977592. Note that the first 3 decimals coincide. The cubic root of 221163154 is about 604.7431042828.

The spelling of 221163154 in words is "two hundred twenty-one million, one hundred sixty-three thousand, one hundred fifty-four".