221444932 has 6 divisors (see below), whose sum is σ = 387528638. Its totient is φ = 110722464.

The previous prime is 221444917. The next prime is 221444939. The reversal of 221444932 is 239444122.

It can be written as a sum of positive squares in only one way, i.e., 152621316 + 68823616 = 12354^2 + 8296^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221444894 and 221444903.

It is not an unprimeable number, because it can be changed into a prime (221444939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27680613 + ... + 27680620.

Almost surely, 2^221444932 is an apocalyptic number.

It is an amenable number.

221444932 is a deficient number, since it is larger than the sum of its proper divisors (166083706).

221444932 is a wasteful number, since it uses less digits than its factorization.

221444932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55361237 (or 55361235 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 221444932 is about 14881.0259054946. The cubic root of 221444932 is about 604.9998242378. Note that the first 3 decimals are identical.

The spelling of 221444932 in words is "two hundred twenty-one million, four hundred forty-four thousand, nine hundred thirty-two".