71223504533221 has 8 divisors (see below), whose sum is σ = 71744868822744. Its totient is φ = 70702161761280.

The previous prime is 71223504533147. The next prime is 71223504533303. The reversal of 71223504533221 is 12233540532217.

It can be written as a sum of positive squares in 4 ways, for example, as 706673928321 + 70516830604900 = 840639^2 + 8397430^2 .

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

It is not a de Polignac number, because 71223504533221 - 2²³ = 71223496144613 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 (71223504533821) 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, 1295061 + ... + 12005173.

It is an arithmetic number, because the mean of its divisors is an integer number (8968108602843).

Almost surely, 2^{71223504533221} is an apocalyptic number.

It is an amenable number.

71223504533221 is a deficient number, since it is larger than the sum of its proper divisors (521364289523).

71223504533221 is a wasteful number, since it uses less digits than its factorization.

71223504533221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10758791.

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 71223504533221 in words is "seventy-one trillion, two hundred twenty-three billion, five hundred four million, five hundred thirty-three thousand, two hundred twenty-one".