231403031 has 8 divisors (see below), whose sum is σ = 245442960. Its totient is φ = 217410688.

The previous prime is 231403021. The next prime is 231403037. The reversal of 231403031 is 130304132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-231403031 is a prime.

It is a super-2 number, since 2×231403031² = 107094725511973922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231403037) 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 7 ways as a sum of consecutive naturals, for example, 1616 + ... + 21573.

It is an arithmetic number, because the mean of its divisors is an integer number (30680370).

Almost surely, 2^231403031 is an apocalyptic number.

231403031 is a deficient number, since it is larger than the sum of its proper divisors (14039929).

231403031 is a wasteful number, since it uses less digits than its factorization.

231403031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23793.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 231403031 is about 15211.9371218790. The cubic root of 231403031 is about 613.9358785653.

Adding to 231403031 its reverse (130304132), we get a palindrome (361707163).

The spelling of 231403031 in words is "two hundred thirty-one million, four hundred three thousand, thirty-one".