71052733421 has 2 divisors, whose sum is σ = 71052733422. Its totient is φ = 71052733420.

The previous prime is 71052733399. The next prime is 71052733441. The reversal of 71052733421 is 12433725017.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59188077796 + 11864655625 = 243286^2 + 108925^2 .

It is a cyclic number.

It is not a de Polignac number, because 71052733421 - 2³⁴ = 53872864237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71052733441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35526366710 + 35526366711.

It is an arithmetic number, because the mean of its divisors is an integer number (35526366711).

Almost surely, 2^71052733421 is an apocalyptic number.

It is an amenable number.

71052733421 is a deficient number, since it is larger than the sum of its proper divisors (1).

71052733421 is an equidigital number, since it uses as much as digits as its factorization.

71052733421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 71052733421 in words is "seventy-one billion, fifty-two million, seven hundred thirty-three thousand, four hundred twenty-one".