231435013 has 4 divisors (see below), whose sum is σ = 233558380. Its totient is φ = 229311648.

The previous prime is 231434981. The next prime is 231435019. The reversal of 231435013 is 310534132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 177235969 + 54199044 = 13313^2 + 7362^2 .

It is a cyclic number.

It is not a de Polignac number, because 231435013 - 2⁵ = 231434981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231435019) 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, 1061520 + ... + 1061737.

It is an arithmetic number, because the mean of its divisors is an integer number (58389595).

Almost surely, 2^231435013 is an apocalyptic number.

It is an amenable number.

231435013 is a deficient number, since it is larger than the sum of its proper divisors (2123367).

231435013 is a wasteful number, since it uses less digits than its factorization.

231435013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123366.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 231435013 is about 15212.9882994762. The cubic root of 231435013 is about 613.9641611000.

Adding to 231435013 its reverse (310534132), we get a palindrome (541969145).

The spelling of 231435013 in words is "two hundred thirty-one million, four hundred thirty-five thousand, thirteen".