221500000065 has 8 divisors (see below), whose sum is σ = 354400000128. Its totient is φ = 118133333360.

The previous prime is 221500000063. The next prime is 221500000097. The reversal of 221500000065 is 560000005122.

221500000065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221500000065 - 2¹ = 221500000063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221499999987 and 221500000050.

It is not an unprimeable number, because it can be changed into a prime (221500000063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7383333321 + ... + 7383333350.

It is an arithmetic number, because the mean of its divisors is an integer number (44300000016).

Almost surely, 2^221500000065 is an apocalyptic number.

It is an amenable number.

221500000065 is a deficient number, since it is larger than the sum of its proper divisors (132900000063).

221500000065 is a wasteful number, since it uses less digits than its factorization.

221500000065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14766666679.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 221500000065 its reverse (560000005122), we get a palindrome (781500005187).

The spelling of 221500000065 in words is "two hundred twenty-one billion, five hundred million, sixty-five", and thus it is an aban number.