221251250 has 40 divisors (see below), whose sum is σ = 452442672. Its totient is φ = 80450000.

The previous prime is 221251223. The next prime is 221251273. The reversal of 221251250 is 52152122.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5705 + ... + 21795.

Almost surely, 2^221251250 is an apocalyptic number.

221251250 is an abundant number, since it is smaller than the sum of its proper divisors (231191422).

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

221251250 is a wasteful number, since it uses less digits than its factorization.

221251250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16124 (or 16109 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 221251250 is about 14874.5167988745. The cubic root of 221251250 is about 604.8233894710.

The spelling of 221251250 in words is "two hundred twenty-one million, two hundred fifty-one thousand, two hundred fifty".