217097250012 has 72 divisors (see below), whose sum is σ = 549992177280. Its totient is φ = 72205257600.

The previous prime is 217097249983. The next prime is 217097250031. The reversal of 217097250012 is 210052790712.

217097250012 is a `hidden beast` number, since 2 + 1 + 70 + 9 + 72 + 500 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34451262 + ... + 34457562.

It is an arithmetic number, because the mean of its divisors is an integer number (7638780240).

Almost surely, 2^217097250012 is an apocalyptic number.

It is an amenable number.

217097250012 is an abundant number, since it is smaller than the sum of its proper divisors (332894927268).

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

217097250012 is a wasteful number, since it uses less digits than its factorization.

217097250012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8283 (or 8278 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The spelling of 217097250012 in words is "two hundred seventeen billion, ninety-seven million, two hundred fifty thousand, twelve".