221151532 has 48 divisors (see below), whose sum is σ = 463357440. Its totient is φ = 90300672.

The previous prime is 221151527. The next prime is 221151569. The reversal of 221151532 is 235151122.

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, 216519 + ... + 217537.

It is an arithmetic number, because the mean of its divisors is an integer number (9653280).

Almost surely, 2^221151532 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 221151532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231678720).

221151532 is an abundant number, since it is smaller than the sum of its proper divisors (242205908).

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

221151532 is a wasteful number, since it uses less digits than its factorization.

221151532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390 (or 1388 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 221151532 is about 14871.1644466733. The cubic root of 221151532 is about 604.7325111266.

The spelling of 221151532 in words is "two hundred twenty-one million, one hundred fifty-one thousand, five hundred thirty-two".