171157531500401 has 2 divisors, whose sum is σ = 171157531500402. Its totient is φ = 171157531500400.

The previous prime is 171157531500317. The next prime is 171157531500407. The reversal of 171157531500401 is 104005135751171.

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., 106239381948001 + 64918149552400 = 10307249^2 + 8057180^2 .

It is an emirp because it is prime and its reverse (104005135751171) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171157531500401 is a prime.

It is not a weakly prime, because it can be changed into another prime (171157531500407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85578765750200 + 85578765750201.

It is an arithmetic number, because the mean of its divisors is an integer number (85578765750201).

Almost surely, 2^{171157531500401} is an apocalyptic number.

It is an amenable number.

171157531500401 is a deficient number, since it is larger than the sum of its proper divisors (1).

171157531500401 is an equidigital number, since it uses as much as digits as its factorization.

171157531500401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73500, while the sum is 41.

The spelling of 171157531500401 in words is "one hundred seventy-one trillion, one hundred fifty-seven billion, five hundred thirty-one million, five hundred thousand, four hundred one".