131444534437 has 8 divisors (see below), whose sum is σ = 135981150840. Its totient is φ = 126908187840.

The previous prime is 131444534423. The next prime is 131444534447. The reversal of 131444534437 is 734435444131.

It can be written as a sum of positive squares in 4 ways, for example, as 33991928161 + 97452606276 = 184369^2 + 312174^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 131444534437 - 2³¹ = 129297050789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131444534393 and 131444534402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131444534447) 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, 1807023 + ... + 1878355.

It is an arithmetic number, because the mean of its divisors is an integer number (16997643855).

Almost surely, 2^131444534437 is an apocalyptic number.

It is an amenable number.

131444534437 is a deficient number, since it is larger than the sum of its proper divisors (4536616403).

131444534437 is an equidigital number, since it uses as much as digits as its factorization.

131444534437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134903.

The product of its digits is 967680, while the sum is 43.

Adding to 131444534437 its reverse (734435444131), we get a palindrome (865879978568).

The spelling of 131444534437 in words is "one hundred thirty-one billion, four hundred forty-four million, five hundred thirty-four thousand, four hundred thirty-seven".