231306386 has 8 divisors (see below), whose sum is σ = 367369020. Its totient is φ = 108850048.

The previous prime is 231306329. The next prime is 231306389. The reversal of 231306386 is 683603132.

231306386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 225570361 + 5736025 = 15019^2 + 2395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (231306389) 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, 3401531 + ... + 3401598.

Almost surely, 2^231306386 is an apocalyptic number.

231306386 is a deficient number, since it is larger than the sum of its proper divisors (136062634).

231306386 is a wasteful number, since it uses less digits than its factorization.

231306386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6803148.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 231306386 is about 15208.7601730056. The cubic root of 231306386 is about 613.8503969781.

The spelling of 231306386 in words is "two hundred thirty-one million, three hundred six thousand, three hundred eighty-six".