231303403 has 4 divisors (see below), whose sum is σ = 236224800. Its totient is φ = 226382008.

The previous prime is 231303383. The next prime is 231303419. The reversal of 231303403 is 304303132.

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 231303403 - 2²¹ = 229206251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231303463) 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, 2460628 + ... + 2460721.

It is an arithmetic number, because the mean of its divisors is an integer number (59056200).

Almost surely, 2^231303403 is an apocalyptic number.

231303403 is a deficient number, since it is larger than the sum of its proper divisors (4921397).

231303403 is an equidigital number, since it uses as much as digits as its factorization.

231303403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4921396.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 231303403 is about 15208.6621042089. The cubic root of 231303403 is about 613.8477581640.

Adding to 231303403 its reverse (304303132), we get a palindrome (535606535).

The spelling of 231303403 in words is "two hundred thirty-one million, three hundred three thousand, four hundred three".