221937146 has 4 divisors (see below), whose sum is σ = 332905722. Its totient is φ = 110968572.

The previous prime is 221937113. The next prime is 221937161. The reversal of 221937146 is 641739122.

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., 175165225 + 46771921 = 13235^2 + 6839^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55484285 + ... + 55484288.

Almost surely, 2^221937146 is an apocalyptic number.

221937146 is a deficient number, since it is larger than the sum of its proper divisors (110968576).

221937146 is a wasteful number, since it uses less digits than its factorization.

221937146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110968575.

The product of its digits is 18144, while the sum is 35.

The square root of 221937146 is about 14897.5550343001. Note that the first 3 decimals coincide. The cubic root of 221937146 is about 605.4477445055.

The spelling of 221937146 in words is "two hundred twenty-one million, nine hundred thirty-seven thousand, one hundred forty-six".