217157005120 has 112 divisors (see below), whose sum is σ = 577873953216. Its totient is φ = 77040128000.

The previous prime is 217157005073. The next prime is 217157005123. The reversal of 217157005120 is 21500751712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217157005123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 608026 + ... + 896665.

It is an arithmetic number, because the mean of its divisors is an integer number (5159588868).

Almost surely, 2^217157005120 is an apocalyptic number.

217157005120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217157005120 is an abundant number, since it is smaller than the sum of its proper divisors (360716948096).

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

217157005120 is a wasteful number, since it uses less digits than its factorization.

217157005120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504760 (or 1504750 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 31.

Adding to 217157005120 its reverse (21500751712), we get a palindrome (238657756832).

The spelling of 217157005120 in words is "two hundred seventeen billion, one hundred fifty-seven million, five thousand, one hundred twenty".