221150064 has 80 divisors (see below), whose sum is σ = 591462144. Its totient is φ = 71155200.

The previous prime is 221150057. The next prime is 221150077. The reversal of 221150064 is 460051122.

It is a self number, because there is not a number n which added to its sum of digits gives 221150064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202159 + ... + 203249.

Almost surely, 2^221150064 is an apocalyptic number.

221150064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221150064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295731072).

221150064 is an abundant number, since it is smaller than the sum of its proper divisors (370312080).

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

221150064 is a wasteful number, since it uses less digits than its factorization.

221150064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 221150064 is about 14871.1150893267. The cubic root of 221150064 is about 604.7311730557.

The spelling of 221150064 in words is "two hundred twenty-one million, one hundred fifty thousand, sixty-four".