231242313 has 16 divisors (see below), whose sum is σ = 329636736. Its totient is φ = 143681280.

The previous prime is 231242309. The next prime is 231242357. The reversal of 231242313 is 313242132.

231242313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231242313 - 2² = 231242309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231242313.

It is not an unprimeable number, because it can be changed into a prime (231242383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16758 + ... + 27263.

It is an arithmetic number, because the mean of its divisors is an integer number (20602296).

Almost surely, 2^231242313 is an apocalyptic number.

It is an amenable number.

231242313 is a deficient number, since it is larger than the sum of its proper divisors (98394423).

231242313 is a wasteful number, since it uses less digits than its factorization.

231242313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44144.

The product of its digits is 864, while the sum is 21.

The square root of 231242313 is about 15206.6535766420. The cubic root of 231242313 is about 613.7937118898.

Adding to 231242313 its reverse (313242132), we get a palindrome (544484445).

The spelling of 231242313 in words is "two hundred thirty-one million, two hundred forty-two thousand, three hundred thirteen".