231342403 has 4 divisors (see below), whose sum is σ = 235707408. Its totient is φ = 226977400.

The previous prime is 231342383. The next prime is 231342431. The reversal of 231342403 is 304243132.

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 231342403 - 2¹³ = 231334211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231342493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2182423 + ... + 2182528.

It is an arithmetic number, because the mean of its divisors is an integer number (58926852).

Almost surely, 2^231342403 is an apocalyptic number.

231342403 is a deficient number, since it is larger than the sum of its proper divisors (4365005).

231342403 is an equidigital number, since it uses as much as digits as its factorization.

231342403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365004.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 231342403 is about 15209.9442142304. The cubic root of 231342403 is about 613.8822564563.

Adding to 231342403 its reverse (304243132), we get a palindrome (535585535).

The spelling of 231342403 in words is "two hundred thirty-one million, three hundred forty-two thousand, four hundred three".