217462684340 has 24 divisors (see below), whose sum is σ = 498187240992. Its totient is φ = 79077339680.

The previous prime is 217462684289. The next prime is 217462684343. The reversal of 217462684340 is 43486264712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217462684343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494233154 + ... + 494233593.

It is an arithmetic number, because the mean of its divisors is an integer number (20757801708).

Almost surely, 2^217462684340 is an apocalyptic number.

217462684340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217462684340 is an abundant number, since it is smaller than the sum of its proper divisors (280724556652).

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

217462684340 is a wasteful number, since it uses less digits than its factorization.

217462684340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988466767 (or 988466765 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 47.

The spelling of 217462684340 in words is "two hundred seventeen billion, four hundred sixty-two million, six hundred eighty-four thousand, three hundred forty".