131404430154321 has 12 divisors (see below), whose sum is σ = 189806697961348. Its totient is φ = 87602815505664.

The previous prime is 131404430154293. The next prime is 131404430154353. The reversal of 131404430154321 is 123451034404131.

131404430154321 is a `hidden beast` number, since 1 + 3 + 1 + 40 + 4 + 430 + 154 + 32 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 106230930171921 + 25173499982400 = 10306839^2 + 5017320^2 .

It is a de Polignac number, because none of the positive numbers 2^k-131404430154321 is a prime.

It is a super-2 number, since 2×131404430154321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131404430154421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5283940 + ... + 17050773.

Almost surely, 2^{131404430154321} is an apocalyptic number.

It is an amenable number.

131404430154321 is a deficient number, since it is larger than the sum of its proper divisors (58402267807027).

131404430154321 is a wasteful number, since it uses less digits than its factorization.

131404430154321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22988432 (or 22988429 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 131404430154321 its reverse (123451034404131), we get a palindrome (254855464558452).

The spelling of 131404430154321 in words is "one hundred thirty-one trillion, four hundred four billion, four hundred thirty million, one hundred fifty-four thousand, three hundred twenty-one".