216020046 has 64 divisors (see below), whose sum is σ = 487618560. Its totient is φ = 63231840.

The previous prime is 216020041. The next prime is 216020081. The reversal of 216020046 is 640020612.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 291945 + ... + 292683.

It is an arithmetic number, because the mean of its divisors is an integer number (7619040).

Almost surely, 2^216020046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216020046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243809280).

216020046 is an abundant number, since it is smaller than the sum of its proper divisors (271598514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216020046 is a wasteful number, since it uses less digits than its factorization.

216020046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 216020046 is about 14697.6204196462. The cubic root of 216020046 is about 600.0185605369.

Adding to 216020046 its reverse (640020612), we get a palindrome (856040658).

The spelling of 216020046 in words is "two hundred sixteen million, twenty thousand, forty-six".