216265519 has 2 divisors, whose sum is σ = 216265520. Its totient is φ = 216265518.

The previous prime is 216265463. The next prime is 216265523. The reversal of 216265519 is 915562612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216265519 is a prime.

It is a super-2 number, since 2×216265519² = 93541549416678722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216265559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108132759 + 108132760.

It is an arithmetic number, because the mean of its divisors is an integer number (108132760).

Almost surely, 2^216265519 is an apocalyptic number.

216265519 is a deficient number, since it is larger than the sum of its proper divisors (1).

216265519 is an equidigital number, since it uses as much as digits as its factorization.

216265519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 216265519 is about 14705.9688222164. The cubic root of 216265519 is about 600.2457502569.

The spelling of 216265519 in words is "two hundred sixteen million, two hundred sixty-five thousand, five hundred nineteen".