168355225 has 12 divisors (see below), whose sum is σ = 213853500. Its totient is φ = 131398400.

The previous prime is 168355169. The next prime is 168355247. The reversal of 168355225 is 522553861.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 85618009 + 82737216 = 9253^2 + 9096^2 .

It is a de Polignac number, because none of the positive numbers 2^k-168355225 is a prime.

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, 81100 + ... + 83149.

It is an arithmetic number, because the mean of its divisors is an integer number (17821125).

Almost surely, 2^168355225 is an apocalyptic number.

It is an amenable number.

168355225 is a deficient number, since it is larger than the sum of its proper divisors (45498275).

168355225 is a wasteful number, since it uses less digits than its factorization.

168355225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164300 (or 164295 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 168355225 is about 12975.1772627583. The cubic root of 168355225 is about 552.1734657953.

The spelling of 168355225 in words is "one hundred sixty-eight million, three hundred fifty-five thousand, two hundred twenty-five".