131440355421 has 16 divisors (see below), whose sum is σ = 191961576000. Its totient is φ = 79628503808.

The previous prime is 131440355413. The next prime is 131440355441. The reversal of 131440355421 is 124553044131.

It is a cyclic number.

It is not a de Polignac number, because 131440355421 - 2³ = 131440355413 is a prime.

It is a super-3 number, since 3×131440355421³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440355441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44434071 + ... + 44437028.

It is an arithmetic number, because the mean of its divisors is an integer number (11997598500).

Almost surely, 2^131440355421 is an apocalyptic number.

It is an amenable number.

131440355421 is a deficient number, since it is larger than the sum of its proper divisors (60521220579).

131440355421 is a wasteful number, since it uses less digits than its factorization.

131440355421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88871148.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 131440355421 its reverse (124553044131), we get a palindrome (255993399552).

The spelling of 131440355421 in words is "one hundred thirty-one billion, four hundred forty million, three hundred fifty-five thousand, four hundred twenty-one".