71316555561331 has 2 divisors, whose sum is σ = 71316555561332. Its totient is φ = 71316555561330.

The previous prime is 71316555561287. The next prime is 71316555561337. The reversal of 71316555561331 is 13316555561317.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71316555561331 - 2²¹ = 71316553464179 is a prime.

It is a super-2 number, since 2×71316555561331² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71316555561337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35658277780665 + 35658277780666.

It is an arithmetic number, because the mean of its divisors is an integer number (35658277780666).

Almost surely, 2^{71316555561331} is an apocalyptic number.

71316555561331 is a deficient number, since it is larger than the sum of its proper divisors (1).

71316555561331 is an equidigital number, since it uses as much as digits as its factorization.

71316555561331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4252500, while the sum is 52.

The spelling of 71316555561331 in words is "seventy-one trillion, three hundred sixteen billion, five hundred fifty-five million, five hundred sixty-one thousand, three hundred thirty-one".