221255650 has 96 divisors (see below), whose sum is σ = 519073920. Its totient is φ = 68160000.

The previous prime is 221255647. The next prime is 221255651. The reversal of 221255650 is 56552122.

It is not an unprimeable number, because it can be changed into a prime (221255651) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 388566 + ... + 389134.

It is an arithmetic number, because the mean of its divisors is an integer number (5407020).

Almost surely, 2^221255650 is an apocalyptic number.

221255650 is an abundant number, since it is smaller than the sum of its proper divisors (297818270).

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

221255650 is a wasteful number, since it uses less digits than its factorization.

221255650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 221255650 is about 14874.6647021034. The cubic root of 221255650 is about 604.8273987971.

The spelling of 221255650 in words is "two hundred twenty-one million, two hundred fifty-five thousand, six hundred fifty".