216553302433306 has 16 divisors (see below), whose sum is σ = 326535174984744. Its totient is φ = 107708320272384.

The previous prime is 216553302433271. The next prime is 216553302433381. The reversal of 216553302433306 is 603334203355612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 216257465433025 + 295837000281 = 14705695^2 + 543909^2 .

It is a super-3 number, since 3×216553302433306³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13345885 + ... + 24722848.

Almost surely, 2^{216553302433306} is an apocalyptic number.

216553302433306 is a deficient number, since it is larger than the sum of its proper divisors (109981872551438).

216553302433306 is a wasteful number, since it uses less digits than its factorization.

216553302433306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38083665.

The product of its (nonzero) digits is 3499200, while the sum is 46.

Adding to 216553302433306 its reverse (603334203355612), we get a palindrome (819887505788918).

The spelling of 216553302433306 in words is "two hundred sixteen trillion, five hundred fifty-three billion, three hundred two million, four hundred thirty-three thousand, three hundred six".