217924049 has 8 divisors (see below), whose sum is σ = 249255168. Its totient is φ = 186642720.

The previous prime is 217924039. The next prime is 217924073. The reversal of 217924049 is 940429712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 217924049 - 2⁴ = 217924033 is a prime.

It is a super-2 number, since 2×217924049² = 94981782265108802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217924039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2537 + ... + 21030.

It is an arithmetic number, because the mean of its divisors is an integer number (31156896).

Almost surely, 2^217924049 is an apocalyptic number.

It is an amenable number.

217924049 is a deficient number, since it is larger than the sum of its proper divisors (31331119).

217924049 is a wasteful number, since it uses less digits than its factorization.

217924049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24895.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 217924049 is about 14762.2508107673. The cubic root of 217924049 is about 601.7762631447.

The spelling of 217924049 in words is "two hundred seventeen million, nine hundred twenty-four thousand, forty-nine".