216432113 has 4 divisors (see below), whose sum is σ = 219171840. Its totient is φ = 213692388.

The previous prime is 216432109. The next prime is 216432121. The reversal of 216432113 is 311234612.

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 216432113 - 2² = 216432109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216432103) 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, 1369745 + ... + 1369902.

It is an arithmetic number, because the mean of its divisors is an integer number (54792960).

Almost surely, 2^216432113 is an apocalyptic number.

It is an amenable number.

216432113 is a deficient number, since it is larger than the sum of its proper divisors (2739727).

216432113 is an equidigital number, since it uses as much as digits as its factorization.

216432113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739726.

The product of its digits is 864, while the sum is 23.

The square root of 216432113 is about 14711.6318945248. The cubic root of 216432113 is about 600.3998381196.

Adding to 216432113 its reverse (311234612), we get a palindrome (527666725).

The spelling of 216432113 in words is "two hundred sixteen million, four hundred thirty-two thousand, one hundred thirteen".