221716152 has 96 divisors (see below), whose sum is σ = 693089280. Its totient is φ = 62717760.

The previous prime is 221716147. The next prime is 221716153. The reversal of 221716152 is 251617122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221716153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49777 + ... + 54047.

It is an arithmetic number, because the mean of its divisors is an integer number (7219680).

Almost surely, 2^221716152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221716152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346544640).

221716152 is an abundant number, since it is smaller than the sum of its proper divisors (471373128).

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

221716152 is a wasteful number, since it uses less digits than its factorization.

221716152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393 (or 4386 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 221716152 is about 14890.1360638511. The cubic root of 221716152 is about 605.2467194909.

The spelling of 221716152 in words is "two hundred twenty-one million, seven hundred sixteen thousand, one hundred fifty-two".