172423160 has 192 divisors, whose sum is σ = 498143520. Its totient is φ = 53222400.

The previous prime is 172423159. The next prime is 172423177. The reversal of 172423160 is 61324271.

It is a Cunningham number, because it is equal to 13131²-1.

It is a super-2 number, since 2×172423160² = 59459492208771200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1707110 + ... + 1707210.

Almost surely, 2^172423160 is an apocalyptic number.

172423160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172423160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249071760).

172423160 is an abundant number, since it is smaller than the sum of its proper divisors (325720360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172423160 is a wasteful number, since it uses less digits than its factorization.

172423160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 172423160 is about 13130.9999619222. Note that the first 4 decimals coincide. The cubic root of 172423160 is about 556.5854726778.

It can be divided in two parts, 17242 and 3160, that added together give a palindrome (20402).

The spelling of 172423160 in words is "one hundred seventy-two million, four hundred twenty-three thousand, one hundred sixty".