217472343 has 8 divisors (see below), whose sum is σ = 316323456. Its totient is φ = 131801400.

The previous prime is 217472287. The next prime is 217472393. The reversal of 217472343 is 343274712.

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

It is not a de Polignac number, because 217472343 - 2¹³ = 217464151 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 6590071 = 217472343 / (2 + 1 + 7 + 4 + 7 + 2 + 3 + 4 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217472393) 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, 3295003 + ... + 3295068.

It is an arithmetic number, because the mean of its divisors is an integer number (39540432).

Almost surely, 2^217472343 is an apocalyptic number.

217472343 is a deficient number, since it is larger than the sum of its proper divisors (98851113).

217472343 is a wasteful number, since it uses less digits than its factorization.

217472343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6590085.

The product of its digits is 28224, while the sum is 33.

The square root of 217472343 is about 14746.9435138269. The cubic root of 217472343 is about 601.3601946762.

It can be divided in two parts, 21747 and 2343, that added together give a triangular number (24090 = T₂₁₉).

The spelling of 217472343 in words is "two hundred seventeen million, four hundred seventy-two thousand, three hundred forty-three".