217135434 has 24 divisors (see below), whose sum is σ = 440366112. Its totient is φ = 71376480.

The previous prime is 217135427. The next prime is 217135447. The reversal of 217135434 is 434531712.

It is a happy number.

217135434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28579 + ... + 35369.

It is an arithmetic number, because the mean of its divisors is an integer number (18348588).

Almost surely, 2^217135434 is an apocalyptic number.

217135434 is an abundant number, since it is smaller than the sum of its proper divisors (223230678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217135434 is an equidigital number, since it uses as much as digits as its factorization.

217135434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6942 (or 6869 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 217135434 is about 14735.5160751159. The cubic root of 217135434 is about 601.0494909886.

The spelling of 217135434 in words is "two hundred seventeen million, one hundred thirty-five thousand, four hundred thirty-four".