216020045 has 8 divisors (see below), whose sum is σ = 260582400. Its totient is φ = 171910480.

The previous prime is 216020041. The next prime is 216020081. The reversal of 216020045 is 540020612.

It is a happy number.

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

It is not a de Polignac number, because 216020045 - 2² = 216020041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216019999 and 216020026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216020041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112145 + ... + 114054.

It is an arithmetic number, because the mean of its divisors is an integer number (32572800).

Almost surely, 2^216020045 is an apocalyptic number.

It is an amenable number.

216020045 is a deficient number, since it is larger than the sum of its proper divisors (44562355).

216020045 is a wasteful number, since it uses less digits than its factorization.

216020045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226395.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 216020045 is about 14697.6203856271. The cubic root of 216020045 is about 600.0185596111.

Adding to 216020045 its reverse (540020612), we get a palindrome (756040657).

The spelling of 216020045 in words is "two hundred sixteen million, twenty thousand, forty-five".