221540700745 has 64 divisors (see below), whose sum is σ = 329718090240. Its totient is φ = 139151996928.

The previous prime is 221540700721. The next prime is 221540700751. The reversal of 221540700745 is 547007045122.

221540700745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221540700745 - 2⁷ = 221540700617 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 36657694 + ... + 36663736.

It is an arithmetic number, because the mean of its divisors is an integer number (5151845160).

Almost surely, 2^221540700745 is an apocalyptic number.

It is an amenable number.

221540700745 is a deficient number, since it is larger than the sum of its proper divisors (108177389495).

221540700745 is a wasteful number, since it uses less digits than its factorization.

221540700745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674.

The product of its (nonzero) digits is 78400, while the sum is 37.

Adding to 221540700745 its reverse (547007045122), we get a palindrome (768547745867).

The spelling of 221540700745 in words is "two hundred twenty-one billion, five hundred forty million, seven hundred thousand, seven hundred forty-five".