221880252 has 48 divisors (see below), whose sum is σ = 594518400. Its totient is φ = 63696960.

The previous prime is 221880203. The next prime is 221880257. The reversal of 221880252 is 252088122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221880257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41727 + ... + 46742.

It is an arithmetic number, because the mean of its divisors is an integer number (12385800).

Almost surely, 2^221880252 is an apocalyptic number.

221880252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221880252 is an abundant number, since it is smaller than the sum of its proper divisors (372638148).

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

221880252 is a wasteful number, since it uses less digits than its factorization.

221880252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88506 (or 88504 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 221880252 is about 14895.6454039427. The cubic root of 221880252 is about 605.3960041990.

The spelling of 221880252 in words is "two hundred twenty-one million, eight hundred eighty thousand, two hundred fifty-two".