131212323 has 48 divisors (see below), whose sum is σ = 214901856. Its totient is φ = 76446720.

The previous prime is 131212321. The next prime is 131212343. The reversal of 131212323 is 323212131.

131212323 is a `hidden beast` number, since 131 + 212 + 323 = 666.

It is not a de Polignac number, because 131212323 - 2¹ = 131212321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131212296 and 131212305.

It is not an unprimeable number, because it can be changed into a prime (131212321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 413761 + ... + 414077.

It is an arithmetic number, because the mean of its divisors is an integer number (4477122).

Almost surely, 2^131212323 is an apocalyptic number.

131212323 is a deficient number, since it is larger than the sum of its proper divisors (83689533).

131212323 is a wasteful number, since it uses less digits than its factorization.

131212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 481 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 131212323 is about 11454.7947602740. The cubic root of 131212323 is about 508.1495454799.

Adding to 131212323 its reverse (323212131), we get a palindrome (454424454).

The spelling of 131212323 in words is "one hundred thirty-one million, two hundred twelve thousand, three hundred twenty-three".