231356413 has 4 divisors (see below), whose sum is σ = 231386940. Its totient is φ = 231325888.

The previous prime is 231356393. The next prime is 231356423. The reversal of 231356413 is 314653132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 167003929 + 64352484 = 12923^2 + 8022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231356413 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 (231356423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5733 + ... + 22261.

It is an arithmetic number, because the mean of its divisors is an integer number (57846735).

Almost surely, 2^231356413 is an apocalyptic number.

It is an amenable number.

231356413 is a deficient number, since it is larger than the sum of its proper divisors (30527).

231356413 is a wasteful number, since it uses less digits than its factorization.

231356413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30526.

The product of its digits is 6480, while the sum is 28.

The square root of 231356413 is about 15210.4047612153. The cubic root of 231356413 is about 613.8946483578.

The spelling of 231356413 in words is "two hundred thirty-one million, three hundred fifty-six thousand, four hundred thirteen".