221627242 has 4 divisors (see below), whose sum is σ = 332440866. Its totient is φ = 110813620.

The previous prime is 221627221. The next prime is 221627243. The reversal of 221627242 is 242726122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 158281561 + 63345681 = 12581^2 + 7959^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221627242.

It is not an unprimeable number, because it can be changed into a prime (221627243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55406809 + ... + 55406812.

Almost surely, 2^221627242 is an apocalyptic number.

221627242 is a deficient number, since it is larger than the sum of its proper divisors (110813624).

221627242 is a wasteful number, since it uses less digits than its factorization.

221627242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110813623.

The product of its digits is 5376, while the sum is 28.

The square root of 221627242 is about 14887.1502309878. The cubic root of 221627242 is about 605.1658057039.

The spelling of 221627242 in words is "two hundred twenty-one million, six hundred twenty-seven thousand, two hundred forty-two".