220991652 has 120 divisors (see below), whose sum is σ = 665945280. Its totient is φ = 62596800.

The previous prime is 220991647. The next prime is 220991669. The reversal of 220991652 is 256199022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 314902 + ... + 315602.

It is an arithmetic number, because the mean of its divisors is an integer number (5549544).

Almost surely, 2^220991652 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 220991652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332972640).

220991652 is an abundant number, since it is smaller than the sum of its proper divisors (444953628).

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

220991652 is a wasteful number, since it uses less digits than its factorization.

220991652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 220991652 is about 14865.7879710428. The cubic root of 220991652 is about 604.5867469055.

The spelling of 220991652 in words is "two hundred twenty million, nine hundred ninety-one thousand, six hundred fifty-two".