231012403 has 4 divisors (see below), whose sum is σ = 238464448. Its totient is φ = 223560360.

The previous prime is 231012401. The next prime is 231012407. The reversal of 231012403 is 304210132.

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 231012403 - 2¹ = 231012401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231012401) 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, 3725976 + ... + 3726037.

It is an arithmetic number, because the mean of its divisors is an integer number (59616112).

Almost surely, 2^231012403 is an apocalyptic number.

231012403 is a deficient number, since it is larger than the sum of its proper divisors (7452045).

231012403 is an equidigital number, since it uses as much as digits as its factorization.

231012403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7452044.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231012403 is about 15199.0921768374. The cubic root of 231012403 is about 613.5902253330.

Adding to 231012403 its reverse (304210132), we get a palindrome (535222535).

The spelling of 231012403 in words is "two hundred thirty-one million, twelve thousand, four hundred three".