221543164565431 has 8 divisors (see below), whose sum is σ = 227539706210064. Its totient is φ = 215547090739200.

The previous prime is 221543164565419. The next prime is 221543164565477. The reversal of 221543164565431 is 134565461345122.

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

It is a cyclic number.

It is not a de Polignac number, because 221543164565431 - 2⁵ = 221543164565399 is a prime.

It is a super-3 number, since 3×221543164565431³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221543164565531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115994545 + ... + 117889018.

It is an arithmetic number, because the mean of its divisors is an integer number (28442463276258).

Almost surely, 2^{221543164565431} is an apocalyptic number.

221543164565431 is a deficient number, since it is larger than the sum of its proper divisors (5996541644633).

221543164565431 is a wasteful number, since it uses less digits than its factorization.

221543164565431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233909201.

The product of its digits is 10368000, while the sum is 52.

The spelling of 221543164565431 in words is "two hundred twenty-one trillion, five hundred forty-three billion, one hundred sixty-four million, five hundred sixty-five thousand, four hundred thirty-one".