221569142 has 8 divisors (see below), whose sum is σ = 332445432. Its totient is φ = 110754000.

The previous prime is 221569129. The next prime is 221569199. The reversal of 221569142 is 241965122.

221569142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221569099 and 221569108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4784 + ... + 21587.

It is an arithmetic number, because the mean of its divisors is an integer number (41555679).

Almost surely, 2^221569142 is an apocalyptic number.

221569142 is a deficient number, since it is larger than the sum of its proper divisors (110876290).

221569142 is a wasteful number, since it uses less digits than its factorization.

221569142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30574.

The product of its digits is 8640, while the sum is 32.

The square root of 221569142 is about 14885.1987558111. The cubic root of 221569142 is about 605.1129192960.

The spelling of 221569142 in words is "two hundred twenty-one million, five hundred sixty-nine thousand, one hundred forty-two".