221500748 has 12 divisors (see below), whose sum is σ = 443001552. Its totient is φ = 94928880.

The previous prime is 221500739. The next prime is 221500757. The reversal of 221500748 is 847005122.

221500748 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221500739) and next prime (221500757).

221500748 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 221500748.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3955343 + ... + 3955398.

It is an arithmetic number, because the mean of its divisors is an integer number (36916796).

Almost surely, 2^221500748 is an apocalyptic number.

221500748 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221500748 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221500748 is a wasteful number, since it uses less digits than its factorization.

221500748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7910752 (or 7910750 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 221500748 is about 14882.9011956675. The cubic root of 221500748 is about 605.0506507693.

The spelling of 221500748 in words is "two hundred twenty-one million, five hundred thousand, seven hundred forty-eight".