217473039 has 16 divisors (see below), whose sum is σ = 368208640. Its totient is φ = 124270200.

The previous prime is 217473019. The next prime is 217473043. The reversal of 217473039 is 930374712.

217473039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 217473039 - 2⁹ = 217472527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 217472994 and 217473012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217473019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575137 + ... + 575514.

It is an arithmetic number, because the mean of its divisors is an integer number (23013040).

Almost surely, 2^217473039 is an apocalyptic number.

217473039 is a deficient number, since it is larger than the sum of its proper divisors (150735601).

217473039 is a wasteful number, since it uses less digits than its factorization.

217473039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150667 (or 1150661 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 217473039 is about 14746.9671119183. The cubic root of 217473039 is about 601.3608362079.

The spelling of 217473039 in words is "two hundred seventeen million, four hundred seventy-three thousand, thirty-nine".