221937016 has 16 divisors (see below), whose sum is σ = 475579440. Its totient is φ = 95115840.

The previous prime is 221937013. The next prime is 221937017. The reversal of 221937016 is 610739122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221937013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1981525 + ... + 1981636.

It is an arithmetic number, because the mean of its divisors is an integer number (29723715).

Almost surely, 2^221937016 is an apocalyptic number.

It is an amenable number.

221937016 is an abundant number, since it is smaller than the sum of its proper divisors (253642424).

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

221937016 is a wasteful number, since it uses less digits than its factorization.

221937016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963174 (or 3963170 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 221937016 is about 14897.5506711674. The cubic root of 221937016 is about 605.4476262915.

The spelling of 221937016 in words is "two hundred twenty-one million, nine hundred thirty-seven thousand, sixteen".