221250015 has 64 divisors (see below), whose sum is σ = 451768320. Its totient is φ = 100638720.

The previous prime is 221249993. The next prime is 221250031. The reversal of 221250015 is 510052122.

It is not a de Polignac number, because 221250015 - 2⁷ = 221249887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221250015.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 242410 + ... + 243320.

It is an arithmetic number, because the mean of its divisors is an integer number (7058880).

Almost surely, 2^221250015 is an apocalyptic number.

221250015 is an abundant number, since it is smaller than the sum of its proper divisors (230518305).

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

221250015 is a wasteful number, since it uses less digits than its factorization.

221250015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 221250015 is about 14874.4752848630. The cubic root of 221250015 is about 604.8222641165.

The spelling of 221250015 in words is "two hundred twenty-one million, two hundred fifty thousand, fifteen".