231551431354441 has 4 divisors (see below), whose sum is σ = 252601561477584. Its totient is φ = 210501301231300.

The previous prime is 231551431354409. The next prime is 231551431354513. The reversal of 231551431354441 is 144453134155132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231551431354441 - 2⁵ = 231551431354409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231551431354391 and 231551431354400.

It is not an unprimeable number, because it can be changed into a prime (231551431354141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10525065061555 + ... + 10525065061576.

It is an arithmetic number, because the mean of its divisors is an integer number (63150390369396).

Almost surely, 2^{231551431354441} is an apocalyptic number.

It is an amenable number.

231551431354441 is a deficient number, since it is larger than the sum of its proper divisors (21050130123143).

231551431354441 is a wasteful number, since it uses less digits than its factorization.

231551431354441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21050130123142.

The product of its digits is 1728000, while the sum is 46.

The spelling of 231551431354441 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred fifty-four thousand, four hundred forty-one".