216430023 has 8 divisors (see below), whose sum is σ = 301120128. Its totient is φ = 138013304.

The previous prime is 216429991. The next prime is 216430037. The reversal of 216430023 is 320034612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216430023 - 2⁵ = 216429991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216432023) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1568265 + ... + 1568402.

It is an arithmetic number, because the mean of its divisors is an integer number (37640016).

Almost surely, 2^216430023 is an apocalyptic number.

216430023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

216430023 is a deficient number, since it is larger than the sum of its proper divisors (84690105).

216430023 is a wasteful number, since it uses less digits than its factorization.

216430023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136693.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 216430023 is about 14711.5608621247. The cubic root of 216430023 is about 600.3979055048.

Adding to 216430023 its reverse (320034612), we get a palindrome (536464635).

The spelling of 216430023 in words is "two hundred sixteen million, four hundred thirty thousand, twenty-three".