168211225 has 24 divisors (see below), whose sum is σ = 256719680. Its totient is φ = 106470720.

The previous prime is 168211181. The next prime is 168211229. The reversal of 168211225 is 522112861.

It is not a de Polignac number, because 168211225 - 2⁷ = 168211097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168211193 and 168211202.

It is not an unprimeable number, because it can be changed into a prime (168211229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34695 + ... + 39244.

Almost surely, 2^168211225 is an apocalyptic number.

It is an amenable number.

168211225 is a deficient number, since it is larger than the sum of its proper divisors (88508455).

168211225 is a wasteful number, since it uses less digits than its factorization.

168211225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73969 (or 73964 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 168211225 is about 12969.6270185384. The cubic root of 168211225 is about 552.0159899187.

The spelling of 168211225 in words is "one hundred sixty-eight million, two hundred eleven thousand, two hundred twenty-five".