168213225 has 12 divisors (see below), whose sum is σ = 278112656. Its totient is φ = 89713680.

The previous prime is 168213193. The next prime is 168213233. The reversal of 168213225 is 522312861.

168213225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 168213225 - 2⁵ = 168213193 is a prime.

It is a super-3 number, since 3×168213225³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168213192 and 168213201.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1121347 + ... + 1121496.

Almost surely, 2^168213225 is an apocalyptic number.

168213225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168213225 is a deficient number, since it is larger than the sum of its proper divisors (109899431).

168213225 is a wasteful number, since it uses less digits than its factorization.

168213225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242856 (or 2242851 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 168213225 is about 12969.7041215288. The cubic root of 168213225 is about 552.0181776990.

The spelling of 168213225 in words is "one hundred sixty-eight million, two hundred thirteen thousand, two hundred twenty-five".