231400013 has 4 divisors (see below), whose sum is σ = 249200028. Its totient is φ = 213600000.

The previous prime is 231400003. The next prime is 231400049. The reversal of 231400013 is 310004132.

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 28536964 + 202863049 = 5342^2 + 14243^2 .

It is a cyclic number.

It is not a de Polignac number, because 231400013 - 2¹⁰ = 231398989 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 (231400003) 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, 8899988 + ... + 8900013.

It is an arithmetic number, because the mean of its divisors is an integer number (62300007).

Almost surely, 2^231400013 is an apocalyptic number.

It is an amenable number.

231400013 is a deficient number, since it is larger than the sum of its proper divisors (17800015).

231400013 is a wasteful number, since it uses less digits than its factorization.

231400013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17800014.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 231400013 is about 15211.8379231439. The cubic root of 231400013 is about 613.9332095329.

Adding to 231400013 its reverse (310004132), we get a palindrome (541404145).

The spelling of 231400013 in words is "two hundred thirty-one million, four hundred thousand, thirteen".