165221132231443 has 4 divisors (see below), whose sum is σ = 165412581979968. Its totient is φ = 165029682482920.

The previous prime is 165221132231431. The next prime is 165221132231459. The reversal of 165221132231443 is 344132231122561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165221132231443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165221132231396 and 165221132231405.

It is not an unprimeable number, because it can be changed into a prime (165221132231413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95724872968 + ... + 95724874693.

It is an arithmetic number, because the mean of its divisors is an integer number (41353145494992).

Almost surely, 2^{165221132231443} is an apocalyptic number.

165221132231443 is a deficient number, since it is larger than the sum of its proper divisors (191449748525).

165221132231443 is an equidigital number, since it uses as much as digits as its factorization.

165221132231443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191449748524.

The product of its digits is 207360, while the sum is 40.

The spelling of 165221132231443 in words is "one hundred sixty-five trillion, two hundred twenty-one billion, one hundred thirty-two million, two hundred thirty-one thousand, four hundred forty-three".