221170050 has 36 divisors (see below), whose sum is σ = 594211410. Its totient is φ = 58978560.

The previous prime is 221170049. The next prime is 221170063. The reversal of 221170050 is 50071122.

It can be written as a sum of positive squares in 3 ways, for example, as 205033761 + 16136289 = 14319^2 + 4017^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 17 ways as a sum of consecutive naturals, for example, 245295 + ... + 246194.

Almost surely, 2^221170050 is an apocalyptic number.

221170050 is an abundant number, since it is smaller than the sum of its proper divisors (373041360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221170050 is a wasteful number, since it uses less digits than its factorization.

221170050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491507 (or 491499 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 221170050 is about 14871.7870479643. The cubic root of 221170050 is about 604.7493896352.

The spelling of 221170050 in words is "two hundred twenty-one million, one hundred seventy thousand, fifty".