231871403 has 4 divisors (see below), whose sum is σ = 231918648. Its totient is φ = 231824160.

The previous prime is 231871397. The next prime is 231871427. The reversal of 231871403 is 304178132.

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 231871403 - 2⁸ = 231871147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231871463) 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, 15278 + ... + 26403.

It is an arithmetic number, because the mean of its divisors is an integer number (57979662).

Almost surely, 2^231871403 is an apocalyptic number.

231871403 is a deficient number, since it is larger than the sum of its proper divisors (47245).

231871403 is an equidigital number, since it uses as much as digits as its factorization.

231871403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47244.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 231871403 is about 15227.3242232508. The cubic root of 231871403 is about 614.3498123359.

The spelling of 231871403 in words is "two hundred thirty-one million, eight hundred seventy-one thousand, four hundred three".