131213233 has 8 divisors (see below), whose sum is σ = 133366400. Its totient is φ = 129072528.

The previous prime is 131213177. The next prime is 131213249. The reversal of 131213233 is 332312131.

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-131213233 is a prime.

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 131213233.

It is not an unprimeable number, because it can be changed into a prime (131213333) 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, 19423 + ... + 25291.

It is an arithmetic number, because the mean of its divisors is an integer number (16670800).

Almost surely, 2^131213233 is an apocalyptic number.

It is an amenable number.

131213233 is a deficient number, since it is larger than the sum of its proper divisors (2153167).

131213233 is an equidigital number, since it uses as much as digits as its factorization.

131213233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6231.

The product of its digits is 324, while the sum is 19.

The square root of 131213233 is about 11454.8344815628. The cubic root of 131213233 is about 508.1507202044.

Adding to 131213233 its reverse (332312131), we get a palindrome (463525364).

The spelling of 131213233 in words is "one hundred thirty-one million, two hundred thirteen thousand, two hundred thirty-three".