216415319 has 2 divisors, whose sum is σ = 216415320. Its totient is φ = 216415318.

The previous prime is 216415291. The next prime is 216415351. The reversal of 216415319 is 913514612.

It is an a-pointer prime, because the next prime (216415351) can be obtained adding 216415319 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216415319 is a prime.

It is a super-2 number, since 2×216415319² = 93671180595743522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_11936093 and since 216415319 and 11936093 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216415369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108207659 + 108207660.

It is an arithmetic number, because the mean of its divisors is an integer number (108207660).

Almost surely, 2^216415319 is an apocalyptic number.

216415319 is a deficient number, since it is larger than the sum of its proper divisors (1).

216415319 is an equidigital number, since it uses as much as digits as its factorization.

216415319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 216415319 is about 14711.0611106065. The cubic root of 216415319 is about 600.3843084221.

The spelling of 216415319 in words is "two hundred sixteen million, four hundred fifteen thousand, three hundred nineteen".