217313398 has 4 divisors (see below), whose sum is σ = 325970100. Its totient is φ = 108656698.

The previous prime is 217313389. The next prime is 217313423. The reversal of 217313398 is 893313712.

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

It is a super-2 number, since 2×217313398² = 94450225900612808, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 54328348 + ... + 54328351.

It is an arithmetic number, because the mean of its divisors is an integer number (81492525).

Almost surely, 2^217313398 is an apocalyptic number.

217313398 is a deficient number, since it is larger than the sum of its proper divisors (108656702).

217313398 is a wasteful number, since it uses less digits than its factorization.

217313398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108656701.

The product of its digits is 27216, while the sum is 37.

The square root of 217313398 is about 14741.5534459568. The cubic root of 217313398 is about 601.2136526826.

The spelling of 217313398 in words is "two hundred seventeen million, three hundred thirteen thousand, three hundred ninety-eight".