231106393 has 12 divisors (see below), whose sum is σ = 272524980. Its totient is φ = 195374592.

The previous prime is 231106373. The next prime is 231106427. The reversal of 231106393 is 393601132.

It can be written as a sum of positive squares in 2 ways, for example, as 158055184 + 73051209 = 12572^2 + 8547^2 .

It is a de Polignac number, because none of the positive numbers 2^k-231106393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231106373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28728 + ... + 35881.

It is an arithmetic number, because the mean of its divisors is an integer number (22710415).

Almost surely, 2^231106393 is an apocalyptic number.

It is an amenable number.

231106393 is a deficient number, since it is larger than the sum of its proper divisors (41418587).

231106393 is an equidigital number, since it uses as much as digits as its factorization.

231106393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64696 (or 64689 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 231106393 is about 15202.1838233854. The cubic root of 231106393 is about 613.6734294162.

The spelling of 231106393 in words is "two hundred thirty-one million, one hundred six thousand, three hundred ninety-three".