221006532 has 24 divisors (see below), whose sum is σ = 515971456. Its totient is φ = 73627488.

The previous prime is 221006531. The next prime is 221006557. The reversal of 221006532 is 235600122.

It is a junction number, because it is equal to n+sod(n) for n = 221006499 and 221006508.

It is not an unprimeable number, because it can be changed into a prime (221006531) 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, 23418 + ... + 31470.

Almost surely, 2^221006532 is an apocalyptic number.

It is an amenable number.

221006532 is an abundant number, since it is smaller than the sum of its proper divisors (294964924).

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

221006532 is a wasteful number, since it uses less digits than its factorization.

221006532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347 (or 10345 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 221006532 is about 14866.2884406297. The cubic root of 221006532 is about 604.6003161193.

Adding to 221006532 its reverse (235600122), we get a palindrome (456606654).

The spelling of 221006532 in words is "two hundred twenty-one million, six thousand, five hundred thirty-two".