221683252 has 36 divisors (see below), whose sum is σ = 452242560. Its totient is φ = 94805424.

The previous prime is 221683151. The next prime is 221683277. The reversal of 221683252 is 252386122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125149 + ... + 126907.

Almost surely, 2^221683252 is an apocalyptic number.

It is an amenable number.

221683252 is an abundant number, since it is smaller than the sum of its proper divisors (230559308).

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

221683252 is a wasteful number, since it uses less digits than its factorization.

221683252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420 (or 2411 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 221683252 is about 14889.0312646592. The cubic root of 221683252 is about 605.2167809082.

The spelling of 221683252 in words is "two hundred twenty-one million, six hundred eighty-three thousand, two hundred fifty-two".