168215125 has 32 divisors (see below), whose sum is σ = 229922784. Its totient is φ = 122112000.

The previous prime is 168215111. The next prime is 168215137. The reversal of 168215125 is 521512861.

It can be written as a sum of positive squares in 16 ways, for example, as 146143921 + 22071204 = 12089^2 + 4698^2 .

It is not a de Polignac number, because 168215125 - 2⁵ = 168215093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98277 + ... + 99973.

It is an arithmetic number, because the mean of its divisors is an integer number (7185087).

Almost surely, 2^168215125 is an apocalyptic number.

It is an amenable number.

168215125 is a deficient number, since it is larger than the sum of its proper divisors (61707659).

168215125 is a wasteful number, since it uses less digits than its factorization.

168215125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786 (or 1776 counting only the distinct ones).

The product of its digits is 4800, while the sum is 31.

The square root of 168215125 is about 12969.7773689451. Note that the first 3 decimals coincide. The cubic root of 168215125 is about 552.0202560742.

Adding to 168215125 its reverse (521512861), we get a palindrome (689727986).

It can be divided in two parts, 1682 and 15125, that added together give a 5-th power (16807 = 7⁵).

The spelling of 168215125 in words is "one hundred sixty-eight million, two hundred fifteen thousand, one hundred twenty-five".