133131233231 has 8 divisors (see below), whose sum is σ = 134388875520. Its totient is φ = 131873839768.

The previous prime is 133131233203. The next prime is 133131233237. The reversal of 133131233231 is 132332131331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133131233231 is a prime.

It is a super-2 number, since 2×133131233231² (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 133131233231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133131233237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1118090 + ... + 1231416.

It is an arithmetic number, because the mean of its divisors is an integer number (16798609440).

Almost surely, 2^133131233231 is an apocalyptic number.

133131233231 is a deficient number, since it is larger than the sum of its proper divisors (1257642289).

133131233231 is a wasteful number, since it uses less digits than its factorization.

133131233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124413.

The product of its digits is 2916, while the sum is 26.

Adding to 133131233231 its reverse (132332131331), we get a palindrome (265463364562).

The spelling of 133131233231 in words is "one hundred thirty-three billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred thirty-one".