131212443 has 32 divisors (see below), whose sum is σ = 194227200. Its totient is φ = 78414336.

The previous prime is 131212439. The next prime is 131212451. The reversal of 131212443 is 344212131.

It is not a de Polignac number, because 131212443 - 2² = 131212439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131212343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116280 + ... + 117402.

It is an arithmetic number, because the mean of its divisors is an integer number (6069600).

Almost surely, 2^131212443 is an apocalyptic number.

131212443 is a deficient number, since it is larger than the sum of its proper divisors (63014757).

131212443 is a wasteful number, since it uses less digits than its factorization.

131212443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its digits is 576, while the sum is 21.

The square root of 131212443 is about 11454.7999982540. The cubic root of 131212443 is about 508.1497003889.

Adding to 131212443 its reverse (344212131), we get a palindrome (475424574).

The spelling of 131212443 in words is "one hundred thirty-one million, two hundred twelve thousand, four hundred forty-three".