171522201945 has 16 divisors (see below), whose sum is σ = 274572038592. Its totient is φ = 91433002560.

The previous prime is 171522201937. The next prime is 171522201959. The reversal of 171522201945 is 549102225171.

It is not a de Polignac number, because 171522201945 - 2³ = 171522201937 is a prime.

It is a super-2 number, since 2×171522201945² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2812902 + ... + 2873231.

It is an arithmetic number, because the mean of its divisors is an integer number (17160752412).

Almost surely, 2^171522201945 is an apocalyptic number.

171522201945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

171522201945 is a deficient number, since it is larger than the sum of its proper divisors (103049836647).

171522201945 is a wasteful number, since it uses less digits than its factorization.

171522201945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688152.

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 171522201945 in words is "one hundred seventy-one billion, five hundred twenty-two million, two hundred one thousand, nine hundred forty-five".