231279613 has 4 divisors (see below), whose sum is σ = 231326368. Its totient is φ = 231232860.

The previous prime is 231279569. The next prime is 231279617. The reversal of 231279613 is 316972132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231279613 - 2¹³ = 231271421 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 (231279617) 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 3 ways as a sum of consecutive naturals, for example, 14943 + ... + 26188.

It is an arithmetic number, because the mean of its divisors is an integer number (57831592).

Almost surely, 2^231279613 is an apocalyptic number.

It is an amenable number.

231279613 is a deficient number, since it is larger than the sum of its proper divisors (46755).

231279613 is an equidigital number, since it uses as much as digits as its factorization.

231279613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46754.

The product of its digits is 13608, while the sum is 34.

The square root of 231279613 is about 15207.8799640187. The cubic root of 231279613 is about 613.8267123015.

The spelling of 231279613 in words is "two hundred thirty-one million, two hundred seventy-nine thousand, six hundred thirteen".