217466466 has 32 divisors (see below), whose sum is σ = 501475968. Its totient is φ = 61582080.

The previous prime is 217466443. The next prime is 217466471. The reversal of 217466466 is 664664712.

It is a happy number.

217466466 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 18165 + ... + 27656.

It is an arithmetic number, because the mean of its divisors is an integer number (15671124).

Almost surely, 2^217466466 is an apocalyptic number.

217466466 is an abundant number, since it is smaller than the sum of its proper divisors (284009502).

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

217466466 is a wasteful number, since it uses less digits than its factorization.

217466466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45946.

The product of its digits is 290304, while the sum is 42.

The square root of 217466466 is about 14746.7442508508. The cubic root of 217466466 is about 601.3547775495.

The spelling of 217466466 in words is "two hundred seventeen million, four hundred sixty-six thousand, four hundred sixty-six".