170221442 has 8 divisors (see below), whose sum is σ = 270351756. Its totient is φ = 80104192.

The previous prime is 170221439. The next prime is 170221453. The reversal of 170221442 is 244122071.

It can be written as a sum of positive squares in 2 ways, for example, as 145709041 + 24512401 = 12071^2 + 4951^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2503223 + ... + 2503290.

Almost surely, 2^170221442 is an apocalyptic number.

170221442 is a deficient number, since it is larger than the sum of its proper divisors (100130314).

170221442 is a wasteful number, since it uses less digits than its factorization.

170221442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006532.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 170221442 is about 13046.8939598665. The cubic root of 170221442 is about 554.2062532735.

The spelling of 170221442 in words is "one hundred seventy million, two hundred twenty-one thousand, four hundred forty-two".