75711473315221 has 2 divisors, whose sum is σ = 75711473315222. Its totient is φ = 75711473315220.

The previous prime is 75711473315173. The next prime is 75711473315351. The reversal of 75711473315221 is 12251337411757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60392155595121 + 15319317720100 = 7771239^2 + 3913990^2 .

It is a cyclic number.

It is not a de Polignac number, because 75711473315221 - 2⁹ = 75711473314709 is a prime.

It is a super-2 number, since 2×75711473315221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75711473315921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37855736657610 + 37855736657611.

It is an arithmetic number, because the mean of its divisors is an integer number (37855736657611).

Almost surely, 2^{75711473315221} is an apocalyptic number.

It is an amenable number.

75711473315221 is a deficient number, since it is larger than the sum of its proper divisors (1).

75711473315221 is an equidigital number, since it uses as much as digits as its factorization.

75711473315221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1234800, while the sum is 49.

The spelling of 75711473315221 in words is "seventy-five trillion, seven hundred eleven billion, four hundred seventy-three million, three hundred fifteen thousand, two hundred twenty-one".