231381943 has 8 divisors (see below), whose sum is σ = 262295600. Its totient is φ = 202341888.

The previous prime is 231381929. The next prime is 231381961. The reversal of 231381943 is 349183132.

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

It is a cyclic number.

It is not a de Polignac number, because 231381943 - 2⁹ = 231381431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231381899 and 231381908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231381973) 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, 468138 + ... + 468631.

It is an arithmetic number, because the mean of its divisors is an integer number (32786950).

Almost surely, 2^231381943 is an apocalyptic number.

231381943 is a deficient number, since it is larger than the sum of its proper divisors (30913657).

231381943 is a wasteful number, since it uses less digits than its factorization.

231381943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936801.

The product of its digits is 15552, while the sum is 34.

The square root of 231381943 is about 15211.2439662245. The cubic root of 231381943 is about 613.9172284594.

It can be divided in two parts, 231381 and 943, that added together give a square (232324 = 482²).

The spelling of 231381943 in words is "two hundred thirty-one million, three hundred eighty-one thousand, nine hundred forty-three".