216432445 has 8 divisors (see below), whose sum is σ = 263595744. Its totient is φ = 170561424.

The previous prime is 216432413. The next prime is 216432451. The reversal of 216432445 is 544234612.

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 216432445 - 2⁵ = 216432413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322699 + ... + 323368.

It is an arithmetic number, because the mean of its divisors is an integer number (32949468).

Almost surely, 2^216432445 is an apocalyptic number.

It is an amenable number.

216432445 is a deficient number, since it is larger than the sum of its proper divisors (47163299).

216432445 is an equidigital number, since it uses as much as digits as its factorization.

216432445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646139.

The product of its digits is 23040, while the sum is 31.

The square root of 216432445 is about 14711.6431781090. The cubic root of 216432445 is about 600.4001451175.

The spelling of 216432445 in words is "two hundred sixteen million, four hundred thirty-two thousand, four hundred forty-five".