231551431354439 has 8 divisors (see below), whose sum is σ = 264659732069760. Its totient is φ = 198450511841016.

The previous prime is 231551431354409. The next prime is 231551431354513. The reversal of 231551431354439 is 934453134155132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231551431354439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231551431354409) 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, 1845233249 + ... + 1845358730.

It is an arithmetic number, because the mean of its divisors is an integer number (33082466508720).

Almost surely, 2^{231551431354439} is an apocalyptic number.

231551431354439 is a deficient number, since it is larger than the sum of its proper divisors (33108300715321).

231551431354439 is an equidigital number, since it uses as much as digits as its factorization.

231551431354439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690600949.

The product of its digits is 11664000, while the sum is 53.

The spelling of 231551431354439 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 thirty-nine".