221836852 has 6 divisors (see below), whose sum is σ = 388214498. Its totient is φ = 110918424.

The previous prime is 221836843. The next prime is 221836877. The reversal of 221836852 is 258638122.

It can be written as a sum of positive squares in only one way, i.e., 195888016 + 25948836 = 13996^2 + 5094^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27729603 + ... + 27729610.

Almost surely, 2^221836852 is an apocalyptic number.

It is an amenable number.

221836852 is a deficient number, since it is larger than the sum of its proper divisors (166377646).

221836852 is a wasteful number, since it uses less digits than its factorization.

221836852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55459217 (or 55459215 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 221836852 is about 14894.1885311017. The cubic root of 221836852 is about 605.3565296031.

The spelling of 221836852 in words is "two hundred twenty-one million, eight hundred thirty-six thousand, eight hundred fifty-two".