231402603 has 4 divisors (see below), whose sum is σ = 308536808. Its totient is φ = 154268400.

The previous prime is 231402583. The next prime is 231402617. The reversal of 231402603 is 306204132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231402603 - 2¹² = 231398507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231402603.

It is not an unprimeable number, because it can be changed into a prime (231404603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38567098 + ... + 38567103.

It is an arithmetic number, because the mean of its divisors is an integer number (77134202).

Almost surely, 2^231402603 is an apocalyptic number.

231402603 is a deficient number, since it is larger than the sum of its proper divisors (77134205).

231402603 is an equidigital number, since it uses as much as digits as its factorization.

231402603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77134204.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231402603 is about 15211.9230539732. The cubic root of 231402603 is about 613.9355000558.

Adding to 231402603 its reverse (306204132), we get a palindrome (537606735).

The spelling of 231402603 in words is "two hundred thirty-one million, four hundred two thousand, six hundred three".