131522123443 has 4 divisors (see below), whose sum is σ = 131523493320. Its totient is φ = 131520753568.

The previous prime is 131522123441. The next prime is 131522123471. The reversal of 131522123443 is 344321225131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131522123443 - 2¹ = 131522123441 is a prime.

It is a super-3 number, since 3×131522123443³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131522123441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529105 + ... + 736882.

It is an arithmetic number, because the mean of its divisors is an integer number (32880873330).

Almost surely, 2^131522123443 is an apocalyptic number.

131522123443 is a deficient number, since it is larger than the sum of its proper divisors (1369877).

131522123443 is a wasteful number, since it uses less digits than its factorization.

131522123443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369876.

The product of its digits is 17280, while the sum is 31.

Adding to 131522123443 its reverse (344321225131), we get a palindrome (475843348574).

The spelling of 131522123443 in words is "one hundred thirty-one billion, five hundred twenty-two million, one hundred twenty-three thousand, four hundred forty-three".