221010064 has 40 divisors (see below), whose sum is σ = 494620128. Its totient is φ = 94548480.

The previous prime is 221010037. The next prime is 221010077. The reversal of 221010064 is 460010122.

It is a Harshad number since it is a multiple of its sum of digits (16).

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 7 ways as a sum of consecutive naturals, for example, 33942 + ... + 39925.

Almost surely, 2^221010064 is an apocalyptic number.

It is an amenable number.

221010064 is an abundant number, since it is smaller than the sum of its proper divisors (273610064).

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

221010064 is a wasteful number, since it uses less digits than its factorization.

221010064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73903 (or 73897 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221010064 is about 14866.4072324150. The cubic root of 221010064 is about 604.6035368943.

Adding to 221010064 its reverse (460010122), we get a palindrome (681020186).

The spelling of 221010064 in words is "two hundred twenty-one million, ten thousand, sixty-four".