231403013 has 2 divisors, whose sum is σ = 231403014. Its totient is φ = 231403012.

The previous prime is 231403009. The next prime is 231403021. The reversal of 231403013 is 310304132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229280164 + 2122849 = 15142^2 + 1457^2 .

It is a cyclic number.

It is not a de Polignac number, because 231403013 - 2² = 231403009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231402982 and 231403000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231403063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115701506 + 115701507.

It is an arithmetic number, because the mean of its divisors is an integer number (115701507).

Almost surely, 2^231403013 is an apocalyptic number.

It is an amenable number.

231403013 is a deficient number, since it is larger than the sum of its proper divisors (1).

231403013 is an equidigital number, since it uses as much as digits as its factorization.

231403013 is an odious number, because the sum of its binary digits is odd.

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

The square root of 231403013 is about 15211.9365302384. The cubic root of 231403013 is about 613.9358626467.

Adding to 231403013 its reverse (310304132), we get a palindrome (541707145).

The spelling of 231403013 in words is "two hundred thirty-one million, four hundred three thousand, thirteen".