221553142 has 16 divisors (see below), whose sum is σ = 339947280. Its totient is φ = 108259552.

The previous prime is 221553131. The next prime is 221553161. The reversal of 221553142 is 241355122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14988 + ... + 25840.

It is an arithmetic number, because the mean of its divisors is an integer number (21246705).

Almost surely, 2^221553142 is an apocalyptic number.

221553142 is a deficient number, since it is larger than the sum of its proper divisors (118394138).

221553142 is a wasteful number, since it uses less digits than its factorization.

221553142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11087.

The product of its digits is 2400, while the sum is 25.

The square root of 221553142 is about 14884.6612994720. The cubic root of 221553142 is about 605.0983534293.

The spelling of 221553142 in words is "two hundred twenty-one million, five hundred fifty-three thousand, one hundred forty-two".