221055240325351 has 16 divisors (see below), whose sum is σ = 234441399324384. Its totient is φ = 207711637095424.

The previous prime is 221055240325349. The next prime is 221055240325357. The reversal of 221055240325351 is 153523042550122.

It is a cyclic number.

It is not a de Polignac number, because 221055240325351 - 2¹ = 221055240325349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221055240325357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972143196 + ... + 972370558.

It is an arithmetic number, because the mean of its divisors is an integer number (14652587457774).

Almost surely, 2^{221055240325351} is an apocalyptic number.

221055240325351 is a deficient number, since it is larger than the sum of its proper divisors (13386158999033).

221055240325351 is a wasteful number, since it uses less digits than its factorization.

221055240325351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320690.

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 221055240325351 its reverse (153523042550122), we get a palindrome (374578282875473).

The spelling of 221055240325351 in words is "two hundred twenty-one trillion, fifty-five billion, two hundred forty million, three hundred twenty-five thousand, three hundred fifty-one".