71520051041 has 2 divisors, whose sum is σ = 71520051042. Its totient is φ = 71520051040.

The previous prime is 71520051023. The next prime is 71520051067. The reversal of 71520051041 is 14015002517.

It is an a-pointer prime, because the next prime (71520051067) can be obtained adding 71520051041 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71251091041 + 268960000 = 266929^2 + 16400^2 .

It is an emirp because it is prime and its reverse (14015002517) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71520051041 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71520051041.

It is not a weakly prime, because it can be changed into another prime (71520081041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35760025520 + 35760025521.

It is an arithmetic number, because the mean of its divisors is an integer number (35760025521).

Almost surely, 2^71520051041 is an apocalyptic number.

It is an amenable number.

71520051041 is a deficient number, since it is larger than the sum of its proper divisors (1).

71520051041 is an equidigital number, since it uses as much as digits as its factorization.

71520051041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 26.

Adding to 71520051041 its reverse (14015002517), we get a palindrome (85535053558).

The spelling of 71520051041 in words is "seventy-one billion, five hundred twenty million, fifty-one thousand, forty-one".