217271072950 has 96 divisors (see below), whose sum is σ = 441304326144. Its totient is φ = 79263152640.

The previous prime is 217271072939. The next prime is 217271073011. The reversal of 217271072950 is 59270172712.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 217271072897 and 217271072906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4618447 + ... + 4665253.

It is an arithmetic number, because the mean of its divisors is an integer number (4596920064).

Almost surely, 2^217271072950 is an apocalyptic number.

217271072950 is an abundant number, since it is smaller than the sum of its proper divisors (224033253194).

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

217271072950 is a wasteful number, since it uses less digits than its factorization.

217271072950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47006 (or 47001 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 43.

The spelling of 217271072950 in words is "two hundred seventeen billion, two hundred seventy-one million, seventy-two thousand, nine hundred fifty".