131423443412 has 24 divisors (see below), whose sum is σ = 233471765352. Its totient is φ = 64723968000.

The previous prime is 131423443397. The next prime is 131423443421. The reversal of 131423443412 is 214344324131.

It can be written as a sum of positive squares in 4 ways, for example, as 28481287696 + 102942155716 = 168764^2 + 320846^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764789 + ... + 920732.

It is an arithmetic number, because the mean of its divisors is an integer number (9727990223).

Almost surely, 2^131423443412 is an apocalyptic number.

It is an amenable number.

131423443412 is a deficient number, since it is larger than the sum of its proper divisors (102048321940).

131423443412 is a wasteful number, since it uses less digits than its factorization.

131423443412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685819 (or 1685817 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

Adding to 131423443412 its reverse (214344324131), we get a palindrome (345767767543).

The spelling of 131423443412 in words is "one hundred thirty-one billion, four hundred twenty-three million, four hundred forty-three thousand, four hundred twelve".