221307016 has 32 divisors (see below), whose sum is σ = 489530880. Its totient is φ = 91785600.

The previous prime is 221307013. The next prime is 221307017. The reversal of 221307016 is 610703122.

It is not an unprimeable number, because it can be changed into a prime (221307011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62005 + ... + 65476.

It is an arithmetic number, because the mean of its divisors is an integer number (15297840).

Almost surely, 2^221307016 is an apocalyptic number.

It is an amenable number.

221307016 is an abundant number, since it is smaller than the sum of its proper divisors (268223864).

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

221307016 is a wasteful number, since it uses less digits than its factorization.

221307016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127525 (or 127521 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 221307016 is about 14876.3912290582. The cubic root of 221307016 is about 604.8742001034.

The spelling of 221307016 in words is "two hundred twenty-one million, three hundred seven thousand, sixteen".