133143216 has 20 divisors (see below), whose sum is σ = 343953432. Its totient is φ = 44381056.

The previous prime is 133143191. The next prime is 133143217. The reversal of 133143216 is 612341331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (133143217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386861 + ... + 1386956.

Almost surely, 2^133143216 is an apocalyptic number.

133143216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133143216 is an abundant number, since it is smaller than the sum of its proper divisors (210810216).

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

133143216 is a wasteful number, since it uses less digits than its factorization.

133143216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773828 (or 2773822 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 133143216 is about 11538.7701251043. The cubic root of 133143216 is about 510.6300249198.

Adding to 133143216 its reverse (612341331), we get a palindrome (745484547).

The spelling of 133143216 in words is "one hundred thirty-three million, one hundred forty-three thousand, two hundred sixteen".