171215023 has 16 divisors (see below), whose sum is σ = 207040000. Its totient is φ = 138311712.

The previous prime is 171215017. The next prime is 171215029. The reversal of 171215023 is 320512171.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (171215017) and next prime (171215029).

It is a de Polignac number, because none of the positive numbers 2^k-171215023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171214985 and 171215003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171215029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23233 + ... + 29701.

It is an arithmetic number, because the mean of its divisors is an integer number (12940000).

Almost surely, 2^171215023 is an apocalyptic number.

171215023 is a deficient number, since it is larger than the sum of its proper divisors (35824977).

171215023 is a wasteful number, since it uses less digits than its factorization.

171215023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 171215023 is about 13084.9158575820. The cubic root of 171215023 is about 555.2824609872.

Adding to 171215023 its reverse (320512171), we get a palindrome (491727194).

The spelling of 171215023 in words is "one hundred seventy-one million, two hundred fifteen thousand, twenty-three".