217240412 has 6 divisors (see below), whose sum is σ = 380170728. Its totient is φ = 108620204.

The previous prime is 217240403. The next prime is 217240423. The reversal of 217240412 is 214042712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27155048 + ... + 27155055.

It is an arithmetic number, because the mean of its divisors is an integer number (63361788).

Almost surely, 2^217240412 is an apocalyptic number.

It is an amenable number.

217240412 is a deficient number, since it is larger than the sum of its proper divisors (162930316).

217240412 is a wasteful number, since it uses less digits than its factorization.

217240412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54310107 (or 54310105 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 217240412 is about 14739.0777187720. The cubic root of 217240412 is about 601.1463380832.

The spelling of 217240412 in words is "two hundred seventeen million, two hundred forty thousand, four hundred twelve".