133333333 has 16 divisors (see below), whose sum is σ = 156389760. Its totient is φ = 111315456.

The previous prime is 133333327. The next prime is 133333357. The reversal of 133333333 is 333333331.

It is not a de Polignac number, because 133333333 - 2²¹ = 131236181 is a prime.

It is a Duffinian number.

133333333 is a modest number, since divided by 33333 gives 1333 as remainder.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 133333298 and 133333307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133333933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45241 + ... + 48097.

It is an arithmetic number, because the mean of its divisors is an integer number (9774360).

Almost surely, 2^133333333 is an apocalyptic number.

133333333 is the 6667-th octagonal number.

It is an amenable number.

133333333 is a deficient number, since it is larger than the sum of its proper divisors (23056427).

133333333 is a wasteful number, since it uses less digits than its factorization.

133333333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036.

The product of its digits is 6561, while the sum is 25.

The square root of 133333333 is about 11547.0053693588. The cubic root of 133333333 is about 510.8729545033.

Adding to 133333333 its reverse (333333331), we get a palindrome (466666664).

The spelling of 133333333 in words is "one hundred thirty-three million, three hundred thirty-three thousand, three hundred thirty-three".