216245417 has 4 divisors (see below), whose sum is σ = 217572240. Its totient is φ = 214918596.

The previous prime is 216245413. The next prime is 216245437. The reversal of 216245417 is 714542612.

216245417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216245417 - 2² = 216245413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216245413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663167 + ... + 663492.

It is an arithmetic number, because the mean of its divisors is an integer number (54393060).

Almost surely, 2^216245417 is an apocalyptic number.

It is an amenable number.

216245417 is a deficient number, since it is larger than the sum of its proper divisors (1326823).

216245417 is a wasteful number, since it uses less digits than its factorization.

216245417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326822.

The product of its digits is 13440, while the sum is 32.

The square root of 216245417 is about 14705.2853423523. The cubic root of 216245417 is about 600.2271519554.

The spelling of 216245417 in words is "two hundred sixteen million, two hundred forty-five thousand, four hundred seventeen".