221452528 has 40 divisors (see below), whose sum is σ = 469898496. Its totient is φ = 100267200.

The previous prime is 221452519. The next prime is 221452529. The reversal of 221452528 is 825254122.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 221452528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221452529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45375 + ... + 50017.

Almost surely, 2^221452528 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 221452528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234949248).

221452528 is an abundant number, since it is smaller than the sum of its proper divisors (248445968).

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

221452528 is a wasteful number, since it uses less digits than its factorization.

221452528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933 (or 4927 counting only the distinct ones).

The product of its digits is 12800, while the sum is 31.

The square root of 221452528 is about 14881.2811276449. The cubic root of 221452528 is about 605.0067417230.

The spelling of 221452528 in words is "two hundred twenty-one million, four hundred fifty-two thousand, five hundred twenty-eight".