217135553340 has 24 divisors (see below), whose sum is σ = 607979549520. Its totient is φ = 57902814208.

The previous prime is 217135553339. The next prime is 217135553389. The reversal of 217135553340 is 43355531712.

217135553340 is digitally balanced in base 2, 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1809462885 + ... + 1809463004.

It is an arithmetic number, because the mean of its divisors is an integer number (25332481230).

Almost surely, 2^217135553340 is an apocalyptic number.

217135553340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217135553340 is an abundant number, since it is smaller than the sum of its proper divisors (390843996180).

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

217135553340 is a wasteful number, since it uses less digits than its factorization.

217135553340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618925901 (or 3618925899 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 39.

The spelling of 217135553340 in words is "two hundred seventeen billion, one hundred thirty-five million, five hundred fifty-three thousand, three hundred forty".