71463805221 has 4 divisors (see below), whose sum is σ = 95285073632. Its totient is φ = 47642536812.

The previous prime is 71463805219. The next prime is 71463805223. The reversal of 71463805221 is 12250836417.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (71463805219) and next prime (71463805223).

It is not a de Polignac number, because 71463805221 - 2¹ = 71463805219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71463805221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71463805223) 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, 11910634201 + ... + 11910634206.

It is an arithmetic number, because the mean of its divisors is an integer number (23821268408).

Almost surely, 2^71463805221 is an apocalyptic number.

It is an amenable number.

71463805221 is a deficient number, since it is larger than the sum of its proper divisors (23821268411).

71463805221 is a wasteful number, since it uses less digits than its factorization.

71463805221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23821268410.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 71463805221 in words is "seventy-one billion, four hundred sixty-three million, eight hundred five thousand, two hundred twenty-one".