216423159 has 4 divisors (see below), whose sum is σ = 288564216. Its totient is φ = 144282104.

The previous prime is 216423157. The next prime is 216423161. The reversal of 216423159 is 951324612.

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

It is an interprime number because it is at equal distance from previous prime (216423157) and next prime (216423161).

It is a cyclic number.

It is not a de Polignac number, because 216423159 - 2¹ = 216423157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216423157) 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, 36070524 + ... + 36070529.

It is an arithmetic number, because the mean of its divisors is an integer number (72141054).

Almost surely, 2^216423159 is an apocalyptic number.

216423159 is a deficient number, since it is larger than the sum of its proper divisors (72141057).

216423159 is an equidigital number, since it uses as much as digits as its factorization.

216423159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72141056.

The product of its digits is 12960, while the sum is 33.

The square root of 216423159 is about 14711.3275743558. The cubic root of 216423159 is about 600.3915583035.

The spelling of 216423159 in words is "two hundred sixteen million, four hundred twenty-three thousand, one hundred fifty-nine".