217474012 has 24 divisors (see below), whose sum is σ = 446705504. Its totient is φ = 90683712.

The previous prime is 217474007. The next prime is 217474031. The reversal of 217474012 is 210474712.

It is a super-2 number, since 2×217474012² = 94589891790752288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103923 + ... + 105994.

Almost surely, 2^217474012 is an apocalyptic number.

It is an amenable number.

217474012 is an abundant number, since it is smaller than the sum of its proper divisors (229231492).

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

217474012 is a wasteful number, since it uses less digits than its factorization.

217474012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209965 (or 209963 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 217474012 is about 14747.0001017156. Note that the first 3 decimals coincide. The cubic root of 217474012 is about 601.3617330597.

The spelling of 217474012 in words is "two hundred seventeen million, four hundred seventy-four thousand, twelve".