216138302 has 4 divisors (see below), whose sum is σ = 324207456. Its totient is φ = 108069150.

The previous prime is 216138301. The next prime is 216138331. The reversal of 216138302 is 203831612.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216138301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54034574 + ... + 54034577.

It is an arithmetic number, because the mean of its divisors is an integer number (81051864).

Almost surely, 2^216138302 is an apocalyptic number.

216138302 is a deficient number, since it is larger than the sum of its proper divisors (108069154).

216138302 is a wasteful number, since it uses less digits than its factorization.

216138302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108069153.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 216138302 is about 14701.6428333707. The cubic root of 216138302 is about 600.1280300860.

Adding to 216138302 its reverse (203831612), we get a palindrome (419969914).

The spelling of 216138302 in words is "two hundred sixteen million, one hundred thirty-eight thousand, three hundred two".