221157600385 has 8 divisors (see below), whose sum is σ = 265581300456. Its totient is φ = 176797960320.

The previous prime is 221157600383. The next prime is 221157600401. The reversal of 221157600385 is 583006751122.

It can be written as a sum of positive squares in 4 ways, for example, as 39510307984 + 181647292401 = 198772^2 + 426201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221157600385 - 2¹ = 221157600383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221157600383) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16007404 + ... + 16021213.

It is an arithmetic number, because the mean of its divisors is an integer number (33197662557).

Almost surely, 2^221157600385 is an apocalyptic number.

It is an amenable number.

221157600385 is a deficient number, since it is larger than the sum of its proper divisors (44423700071).

221157600385 is a wasteful number, since it uses less digits than its factorization.

221157600385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32030003.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 221157600385 in words is "two hundred twenty-one billion, one hundred fifty-seven million, six hundred thousand, three hundred eighty-five".