217713742 has 16 divisors (see below), whose sum is σ = 344998800. Its totient is φ = 102755520.

The previous prime is 217713737. The next prime is 217713757. The reversal of 217713742 is 247317712.

217713742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 217713698 and 217713707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484 + ... + 20872.

It is an arithmetic number, because the mean of its divisors is an integer number (21562425).

Almost surely, 2^217713742 is an apocalyptic number.

217713742 is a deficient number, since it is larger than the sum of its proper divisors (127285058).

217713742 is a wasteful number, since it uses less digits than its factorization.

217713742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20691.

The product of its digits is 16464, while the sum is 34.

The square root of 217713742 is about 14755.1259567650. The cubic root of 217713742 is about 601.5826200010.

The spelling of 217713742 in words is "two hundred seventeen million, seven hundred thirteen thousand, seven hundred forty-two".