221946930 has 48 divisors (see below), whose sum is σ = 577908864. Its totient is φ = 59099040.

The previous prime is 221946929. The next prime is 221946931. The reversal of 221946930 is 39649122.

221946930 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 (221946929) and next prime (221946931).

It is not an unprimeable number, because it can be changed into a prime (221946931) 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 23 ways as a sum of consecutive naturals, for example, 80637 + ... + 83343.

It is an arithmetic number, because the mean of its divisors is an integer number (12039768).

Almost surely, 2^221946930 is an apocalyptic number.

221946930 is an abundant number, since it is smaller than the sum of its proper divisors (355961934).

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

221946930 is a wasteful number, since it uses less digits than its factorization.

221946930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631 (or 3628 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 221946930 is about 14897.8834067125. The cubic root of 221946930 is about 605.4566413393.

The spelling of 221946930 in words is "two hundred twenty-one million, nine hundred forty-six thousand, nine hundred thirty".