221543271246655 has 16 divisors (see below), whose sum is σ = 271344041925120. Its totient is φ = 173584960177408.

The previous prime is 221543271246653. The next prime is 221543271246667. The reversal of 221543271246655 is 556642172345122.

It is a cyclic number.

It is not a de Polignac number, because 221543271246655 - 2¹ = 221543271246653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221543271246596 and 221543271246605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221543271246653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734482207 + ... + 734783776.

It is an arithmetic number, because the mean of its divisors is an integer number (16959002620320).

Almost surely, 2^{221543271246655} is an apocalyptic number.

221543271246655 is a deficient number, since it is larger than the sum of its proper divisors (49800770678465).

221543271246655 is a wasteful number, since it uses less digits than its factorization.

221543271246655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469266610.

The product of its digits is 24192000, while the sum is 55.

The spelling of 221543271246655 in words is "two hundred twenty-one trillion, five hundred forty-three billion, two hundred seventy-one million, two hundred forty-six thousand, six hundred fifty-five".