221040364 has 6 divisors (see below), whose sum is σ = 386820644. Its totient is φ = 110520180.

The previous prime is 221040359. The next prime is 221040397. The reversal of 221040364 is 463040122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27630042 + ... + 27630049.

Almost surely, 2^221040364 is an apocalyptic number.

It is an amenable number.

221040364 is a deficient number, since it is larger than the sum of its proper divisors (165780280).

221040364 is a wasteful number, since it uses less digits than its factorization.

221040364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55260095 (or 55260093 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 221040364 is about 14867.4262735687. The cubic root of 221040364 is about 604.6311655758.

Adding to 221040364 its reverse (463040122), we get a palindrome (684080486).

The spelling of 221040364 in words is "two hundred twenty-one million, forty thousand, three hundred sixty-four".