217016340 has 24 divisors (see below), whose sum is σ = 607645920. Its totient is φ = 57871008.

The previous prime is 217016311. The next prime is 217016363. The reversal of 217016340 is 43610712.

217016340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 217016340.

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, 1808410 + ... + 1808529.

It is an arithmetic number, because the mean of its divisors is an integer number (25318580).

Almost surely, 2^217016340 is an apocalyptic number.

217016340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217016340 is an abundant number, since it is smaller than the sum of its proper divisors (390629580).

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

217016340 is a wasteful number, since it uses less digits than its factorization.

217016340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616951 (or 3616949 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 217016340 is about 14731.4744679547. The cubic root of 217016340 is about 600.9395834258.

The spelling of 217016340 in words is "two hundred seventeen million, sixteen thousand, three hundred forty".