217164412 has 24 divisors (see below), whose sum is σ = 396264960. Its totient is φ = 104005440.

The previous prime is 217164401. The next prime is 217164421. The reversal of 217164412 is 214461712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7362 + ... + 22102.

It is an arithmetic number, because the mean of its divisors is an integer number (16511040).

Almost surely, 2^217164412 is an apocalyptic number.

It is an amenable number.

217164412 is a deficient number, since it is larger than the sum of its proper divisors (179100548).

217164412 is a wasteful number, since it uses less digits than its factorization.

217164412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14901 (or 14899 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 217164412 is about 14736.4993129305. The cubic root of 217164412 is about 601.0762276617.

The spelling of 217164412 in words is "two hundred seventeen million, one hundred sixty-four thousand, four hundred twelve".