217797146 has 16 divisors (see below), whose sum is σ = 377866944. Its totient is φ = 92216544.

The previous prime is 217797079. The next prime is 217797157. The reversal of 217797146 is 641797712.

It is a junction number, because it is equal to n+sod(n) for n = 217797097 and 217797106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92555 + ... + 94878.

It is an arithmetic number, because the mean of its divisors is an integer number (23616684).

Almost surely, 2^217797146 is an apocalyptic number.

217797146 is a deficient number, since it is larger than the sum of its proper divisors (160069798).

217797146 is a wasteful number, since it uses less digits than its factorization.

217797146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187525.

The product of its digits is 148176, while the sum is 44.

The square root of 217797146 is about 14757.9519581817. The cubic root of 217797146 is about 601.6594303280.

The spelling of 217797146 in words is "two hundred seventeen million, seven hundred ninety-seven thousand, one hundred forty-six".