133303216 has 20 divisors (see below), whose sum is σ = 269505072. Its totient is φ = 63753536.

The previous prime is 133303211. The next prime is 133303217. The reversal of 133303216 is 612303331.

It is not an unprimeable number, because it can be changed into a prime (133303211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180751 + ... + 181486.

Almost surely, 2^133303216 is an apocalyptic number.

133303216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133303216 is an abundant number, since it is smaller than the sum of its proper divisors (136201856).

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

133303216 is a wasteful number, since it uses less digits than its factorization.

133303216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362268 (or 362262 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 133303216 is about 11545.7011913526. The cubic root of 133303216 is about 510.8344867048.

Adding to 133303216 its reverse (612303331), we get a palindrome (745606547).

The spelling of 133303216 in words is "one hundred thirty-three million, three hundred three thousand, two hundred sixteen".