231311244439 has 4 divisors (see below), whose sum is σ = 252339539400. Its totient is φ = 210282949480.

The previous prime is 231311244389. The next prime is 231311244449. The reversal of 231311244439 is 934442113132.

It is a happy number.

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 231311244439 - 2²⁷ = 231177026711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231311244398 and 231311244407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311244449) 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, 10514147464 + ... + 10514147485.

It is an arithmetic number, because the mean of its divisors is an integer number (63084884850).

Almost surely, 2^231311244439 is an apocalyptic number.

231311244439 is a deficient number, since it is larger than the sum of its proper divisors (21028294961).

231311244439 is a wasteful number, since it uses less digits than its factorization.

231311244439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21028294960.

The product of its digits is 62208, while the sum is 37.

The spelling of 231311244439 in words is "two hundred thirty-one billion, three hundred eleven million, two hundred forty-four thousand, four hundred thirty-nine".