217141209372 has 48 divisors (see below), whose sum is σ = 537447536640. Its totient is φ = 67998158592.

The previous prime is 217141209359. The next prime is 217141209401. The reversal of 217141209372 is 273902141712.

It is a happy number.

217141209372 is digitally balanced in base 3, 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 217141209372.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861372 + ... + 1084547.

It is an arithmetic number, because the mean of its divisors is an integer number (11196823680).

Almost surely, 2^217141209372 is an apocalyptic number.

It is an amenable number.

217141209372 is an abundant number, since it is smaller than the sum of its proper divisors (320306327268).

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

217141209372 is a wasteful number, since it uses less digits than its factorization.

217141209372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946490 (or 1946488 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 217141209372 in words is "two hundred seventeen billion, one hundred forty-one million, two hundred nine thousand, three hundred seventy-two".