221546652 has 96 divisors (see below), whose sum is σ = 566092800. Its totient is φ = 67172352.

The previous prime is 221546641. The next prime is 221546659. The reversal of 221546652 is 256645122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221546659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 950728 + ... + 950960.

It is an arithmetic number, because the mean of its divisors is an integer number (5896800).

Almost surely, 2^221546652 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 221546652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283046400).

221546652 is an abundant number, since it is smaller than the sum of its proper divisors (344546148).

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

221546652 is a wasteful number, since it uses less digits than its factorization.

221546652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 393 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 221546652 is about 14884.4432882120. The cubic root of 221546652 is about 605.0924449497.

The spelling of 221546652 in words is "two hundred twenty-one million, five hundred forty-six thousand, six hundred fifty-two".