133313233231 has 4 divisors (see below), whose sum is σ = 133455510832. Its totient is φ = 133170955632.

The previous prime is 133313233211. The next prime is 133313233243. The reversal of 133313233231 is 132332313331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132332313331 = 31 ⋅4268784301.

It is a cyclic number.

It is not a de Polignac number, because 133313233231 - 2⁷ = 133313233103 is a prime.

It is a super-2 number, since 2×133313233231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133313233231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133313233211) 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, 71137395 + ... + 71139268.

It is an arithmetic number, because the mean of its divisors is an integer number (33363877708).

Almost surely, 2^133313233231 is an apocalyptic number.

133313233231 is a deficient number, since it is larger than the sum of its proper divisors (142277601).

133313233231 is an equidigital number, since it uses as much as digits as its factorization.

133313233231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142277600.

The product of its digits is 8748, while the sum is 28.

Adding to 133313233231 its reverse (132332313331), we get a palindrome (265645546562).

The spelling of 133313233231 in words is "one hundred thirty-three billion, three hundred thirteen million, two hundred thirty-three thousand, two hundred thirty-one".