217260047 has 8 divisors (see below), whose sum is σ = 227228544. Its totient is φ = 207335128.

The previous prime is 217260023. The next prime is 217260067. The reversal of 217260047 is 740062712.

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 217260047 - 2¹⁸ = 216997903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217260067) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 473 + ... + 20850.

It is an arithmetic number, because the mean of its divisors is an integer number (28403568).

Almost surely, 2^217260047 is an apocalyptic number.

217260047 is a deficient number, since it is larger than the sum of its proper divisors (9968497).

217260047 is a wasteful number, since it uses less digits than its factorization.

217260047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21789.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 217260047 is about 14739.7437901749. The cubic root of 217260047 is about 601.1644488215.

The spelling of 217260047 in words is "two hundred seventeen million, two hundred sixty thousand, forty-seven".