71352446021 has 2 divisors, whose sum is σ = 71352446022. Its totient is φ = 71352446020.

The previous prime is 71352445999. The next prime is 71352446069. The reversal of 71352446021 is 12064425317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68534004100 + 2818441921 = 261790^2 + 53089^2 .

It is a cyclic number.

It is not a de Polignac number, because 71352446021 - 2²⁶ = 71285337157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71352446521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35676223010 + 35676223011.

It is an arithmetic number, because the mean of its divisors is an integer number (35676223011).

Almost surely, 2^71352446021 is an apocalyptic number.

It is an amenable number.

71352446021 is a deficient number, since it is larger than the sum of its proper divisors (1).

71352446021 is an equidigital number, since it uses as much as digits as its factorization.

71352446021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 71352446021 in words is "seventy-one billion, three hundred fifty-two million, four hundred forty-six thousand, twenty-one".