171213672523 has 2 divisors, whose sum is σ = 171213672524. Its totient is φ = 171213672522.

The previous prime is 171213672463. The next prime is 171213672529. The reversal of 171213672523 is 325276312171.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171213672523 - 2⁹ = 171213672011 is a prime.

It is not a weakly prime, because it can be changed into another prime (171213672529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85606836261 + 85606836262.

It is an arithmetic number, because the mean of its divisors is an integer number (85606836262).

Almost surely, 2^171213672523 is an apocalyptic number.

171213672523 is a deficient number, since it is larger than the sum of its proper divisors (1).

171213672523 is an equidigital number, since it uses as much as digits as its factorization.

171213672523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

Adding to 171213672523 its reverse (325276312171), we get a palindrome (496489984694).

The spelling of 171213672523 in words is "one hundred seventy-one billion, two hundred thirteen million, six hundred seventy-two thousand, five hundred twenty-three".