221452530 has 96 divisors (see below), whose sum is σ = 594501120. Its totient is φ = 52715520.

The previous prime is 221452529. The next prime is 221452589. The reversal of 221452530 is 35254122.

221452530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221452530.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156466 + ... + 157874.

It is an arithmetic number, because the mean of its divisors is an integer number (6192720).

Almost surely, 2^221452530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221452530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297250560).

221452530 is an abundant number, since it is smaller than the sum of its proper divisors (373048590).

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

221452530 is a wasteful number, since it uses less digits than its factorization.

221452530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 221452530 is about 14881.2811948434. The cubic root of 221452530 is about 605.0067435443.

The spelling of 221452530 in words is "two hundred twenty-one million, four hundred fifty-two thousand, five hundred thirty".