221450565530 has 32 divisors (see below), whose sum is σ = 412543991808. Its totient is φ = 85498934400.

The previous prime is 221450565527. The next prime is 221450565533. The reversal of 221450565530 is 35565054122.

It is an interprime number because it is at equal distance from previous prime (221450565527) and next prime (221450565533).

It is not an unprimeable number, because it can be changed into a prime (221450565533) 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, 813851 + ... + 1051310.

It is an arithmetic number, because the mean of its divisors is an integer number (12891999744).

Almost surely, 2^221450565530 is an apocalyptic number.

221450565530 is a deficient number, since it is larger than the sum of its proper divisors (191093426278).

221450565530 is a wasteful number, since it uses less digits than its factorization.

221450565530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865582.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 221450565530 in words is "two hundred twenty-one billion, four hundred fifty million, five hundred sixty-five thousand, five hundred thirty".