231471939 has 8 divisors (see below), whose sum is σ = 319271760. Its totient is φ = 148993376.

The previous prime is 231471907. The next prime is 231471943. The reversal of 231471939 is 939174132.

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 231471939 - 2⁵ = 231471907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231471897 and 231471906.

It is not an unprimeable number, because it can be changed into a prime (231471959) 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, 1330212 + ... + 1330385.

It is an arithmetic number, because the mean of its divisors is an integer number (39908970).

Almost surely, 2^231471939 is an apocalyptic number.

231471939 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

231471939 is a deficient number, since it is larger than the sum of its proper divisors (87799821).

231471939 is a wasteful number, since it uses less digits than its factorization.

231471939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660629.

The product of its digits is 40824, while the sum is 39.

The square root of 231471939 is about 15214.2018850809. The cubic root of 231471939 is about 613.9968125049.

The spelling of 231471939 in words is "two hundred thirty-one million, four hundred seventy-one thousand, nine hundred thirty-nine".