133203131 has 4 divisors (see below), whose sum is σ = 134808072. Its totient is φ = 131598192.

The previous prime is 133203113. The next prime is 133203139. The reversal of 133203131 is 131302331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133203131 - 2⁶ = 133203067 is a prime.

It is a super-3 number, since 3×133203131³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133203139) 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, 802346 + ... + 802511.

It is an arithmetic number, because the mean of its divisors is an integer number (33702018).

Almost surely, 2^133203131 is an apocalyptic number.

133203131 is a deficient number, since it is larger than the sum of its proper divisors (1604941).

133203131 is an equidigital number, since it uses as much as digits as its factorization.

133203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604940.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 133203131 is about 11541.3660803217. The cubic root of 133203131 is about 510.7066086437.

Adding to 133203131 its reverse (131302331), we get a palindrome (264505462).

The spelling of 133203131 in words is "one hundred thirty-three million, two hundred three thousand, one hundred thirty-one".