217040534 has 16 divisors (see below), whose sum is σ = 347394480. Its totient is φ = 101399040.

The previous prime is 217040521. The next prime is 217040561. The reversal of 217040534 is 435040712.

217040534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36347 + ... + 41894.

It is an arithmetic number, because the mean of its divisors is an integer number (21712155).

Almost surely, 2^217040534 is an apocalyptic number.

217040534 is a deficient number, since it is larger than the sum of its proper divisors (130353946).

217040534 is a wasteful number, since it uses less digits than its factorization.

217040534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78335.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 217040534 is about 14732.2956120219. The cubic root of 217040534 is about 600.9619144509.

The spelling of 217040534 in words is "two hundred seventeen million, forty thousand, five hundred thirty-four".