171522423 has 12 divisors (see below), whose sum is σ = 251816968. Its totient is φ = 112473360.

The previous prime is 171522397. The next prime is 171522433. The reversal of 171522423 is 324225171.

It is not a de Polignac number, because 171522423 - 2¹² = 171518327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171522433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155665 + ... + 156762.

Almost surely, 2^171522423 is an apocalyptic number.

171522423 is a deficient number, since it is larger than the sum of its proper divisors (80294545).

171522423 is a wasteful number, since it uses less digits than its factorization.

171522423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312494 (or 312491 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 171522423 is about 13096.6569398454. The cubic root of 171522423 is about 555.6145809390.

Adding to 171522423 its reverse (324225171), we get a palindrome (495747594).

The spelling of 171522423 in words is "one hundred seventy-one million, five hundred twenty-two thousand, four hundred twenty-three".