217421014 has 4 divisors (see below), whose sum is σ = 326131524. Its totient is φ = 108710506.

The previous prime is 217421003. The next prime is 217421021. The reversal of 217421014 is 410124712.

It is a semiprime because it is the product of two primes.

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, 54355252 + ... + 54355255.

It is an arithmetic number, because the mean of its divisors is an integer number (81532881).

Almost surely, 2^217421014 is an apocalyptic number.

217421014 is a deficient number, since it is larger than the sum of its proper divisors (108710510).

217421014 is a wasteful number, since it uses less digits than its factorization.

217421014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108710509.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 217421014 is about 14745.2030843932. The cubic root of 217421014 is about 601.3128788569.

Adding to 217421014 its reverse (410124712), we get a palindrome (627545726).

The spelling of 217421014 in words is "two hundred seventeen million, four hundred twenty-one thousand, fourteen".