221850383385 has 32 divisors (see below), whose sum is σ = 355508904960. Its totient is φ = 118137600000.

The previous prime is 221850383357. The next prime is 221850383407. The reversal of 221850383385 is 583383058122.

It is not a de Polignac number, because 221850383385 - 2¹⁰ = 221850382361 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31684885 + ... + 31691885.

It is an arithmetic number, because the mean of its divisors is an integer number (11109653280).

Almost surely, 2^221850383385 is an apocalyptic number.

It is an amenable number.

221850383385 is a deficient number, since it is larger than the sum of its proper divisors (133658521575).

221850383385 is a wasteful number, since it uses less digits than its factorization.

221850383385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9969.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 221850383385 in words is "two hundred twenty-one billion, eight hundred fifty million, three hundred eighty-three thousand, three hundred eighty-five".