217125946 has 4 divisors (see below), whose sum is σ = 325688922. Its totient is φ = 108562972.

The previous prime is 217125917. The next prime is 217125967. The reversal of 217125946 is 649521712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 179854921 + 37271025 = 13411^2 + 6105^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54281485 + ... + 54281488.

Almost surely, 2^217125946 is an apocalyptic number.

217125946 is a deficient number, since it is larger than the sum of its proper divisors (108562976).

217125946 is a wasteful number, since it uses less digits than its factorization.

217125946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108562975.

The product of its digits is 30240, while the sum is 37.

The square root of 217125946 is about 14735.1941283446. The cubic root of 217125946 is about 601.0407363287.

The spelling of 217125946 in words is "two hundred seventeen million, one hundred twenty-five thousand, nine hundred forty-six".