217151996 has 6 divisors (see below), whose sum is σ = 380016000. Its totient is φ = 108575996.

The previous prime is 217151989. The next prime is 217152011. The reversal of 217151996 is 699151712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27143996 + ... + 27144003.

It is an arithmetic number, because the mean of its divisors is an integer number (63336000).

Almost surely, 2^217151996 is an apocalyptic number.

It is an amenable number.

217151996 is a deficient number, since it is larger than the sum of its proper divisors (162864004).

217151996 is a wasteful number, since it uses less digits than its factorization.

217151996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54288003 (or 54288001 counting only the distinct ones).

The product of its digits is 34020, while the sum is 41.

The square root of 217151996 is about 14736.0780399671. The cubic root of 217151996 is about 601.0647722785.

The spelling of 217151996 in words is "two hundred seventeen million, one hundred fifty-one thousand, nine hundred ninety-six".