133333313 has 4 divisors (see below), whose sum is σ = 136170240. Its totient is φ = 130496388.

The previous prime is 133333309. The next prime is 133333327. The reversal of 133333313 is 313333331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313333331 = 2647 ⋅118373.

It is a cyclic number.

It is not a de Polignac number, because 133333313 - 2² = 133333309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133333513) 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, 1418393 + ... + 1418486.

It is an arithmetic number, because the mean of its divisors is an integer number (34042560).

Almost surely, 2^133333313 is an apocalyptic number.

It is an amenable number.

133333313 is a deficient number, since it is larger than the sum of its proper divisors (2836927).

133333313 is an equidigital number, since it uses as much as digits as its factorization.

133333313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836926.

The product of its digits is 2187, while the sum is 23.

The square root of 133333313 is about 11547.0045033333. The cubic root of 133333313 is about 510.8729289597.

Adding to 133333313 its reverse (313333331), we get a palindrome (446666644).

It can be divided in two parts, 13333331 and 3, that multiplied together give a palindrome (39999993).

The spelling of 133333313 in words is "one hundred thirty-three million, three hundred thirty-three thousand, three hundred thirteen".