231312402243 has 16 divisors (see below), whose sum is σ = 369045428640. Its totient is φ = 142346093472.

The previous prime is 231312402229. The next prime is 231312402247. The reversal of 231312402243 is 342204213132.

231312402243 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 12 + 402 + 243 = 666.

It is not a de Polignac number, because 231312402243 - 2⁴ = 231312402227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (231312402247) 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, 329504496 + ... + 329505197.

It is an arithmetic number, because the mean of its divisors is an integer number (23065339290).

Almost surely, 2^231312402243 is an apocalyptic number.

231312402243 is a deficient number, since it is larger than the sum of its proper divisors (137733026397).

231312402243 is a wasteful number, since it uses less digits than its factorization.

231312402243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659009715 (or 659009709 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 231312402243 its reverse (342204213132), we get a palindrome (573516615375).

The spelling of 231312402243 in words is "two hundred thirty-one billion, three hundred twelve million, four hundred two thousand, two hundred forty-three".