231403065 has 64 divisors (see below), whose sum is σ = 411236352. Its totient is φ = 110592000.

The previous prime is 231403063. The next prime is 231403079. The reversal of 231403065 is 560304132.

It is a happy number.

It is not a de Polignac number, because 231403065 - 2¹ = 231403063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231403063) 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 63 ways as a sum of consecutive naturals, for example, 576865 + ... + 577265.

It is an arithmetic number, because the mean of its divisors is an integer number (6425568).

Almost surely, 2^231403065 is an apocalyptic number.

It is an amenable number.

231403065 is a deficient number, since it is larger than the sum of its proper divisors (179833287).

231403065 is a wasteful number, since it uses less digits than its factorization.

231403065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 231403065 is about 15211.9382394224. The cubic root of 231403065 is about 613.9359086338.

Adding to 231403065 its reverse (560304132), we get a palindrome (791707197).

The spelling of 231403065 in words is "two hundred thirty-one million, four hundred three thousand, sixty-five".