217085412 has 24 divisors (see below), whose sum is σ = 533192800. Its totient is φ = 68553216.

The previous prime is 217085399. The next prime is 217085419. The reversal of 217085412 is 214580712.

It is a super-2 number, since 2×217085412² = 94252152206419488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 217085412.

It is not an unprimeable number, because it can be changed into a prime (217085419) 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, 475837 + ... + 476292.

Almost surely, 2^217085412 is an apocalyptic number.

It is an amenable number.

217085412 is an abundant number, since it is smaller than the sum of its proper divisors (316107388).

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

217085412 is a wasteful number, since it uses less digits than its factorization.

217085412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952155 (or 952153 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 217085412 is about 14733.8186496237. The cubic root of 217085412 is about 601.0033323828.

The spelling of 217085412 in words is "two hundred seventeen million, eighty-five thousand, four hundred twelve".