231403061 has 4 divisors (see below), whose sum is σ = 231438252. Its totient is φ = 231367872.

The previous prime is 231403037. The next prime is 231403063. The reversal of 231403061 is 160304132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 197402500 + 34000561 = 14050^2 + 5831^2 .

It is a cyclic number.

It is not a de Polignac number, because 231403061 - 2¹⁰ = 231402037 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 (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 3 ways as a sum of consecutive naturals, for example, 4466 + ... + 21971.

It is an arithmetic number, because the mean of its divisors is an integer number (57859563).

Almost surely, 2^231403061 is an apocalyptic number.

It is an amenable number.

231403061 is a deficient number, since it is larger than the sum of its proper divisors (35191).

231403061 is an equidigital number, since it uses as much as digits as its factorization.

231403061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35190.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 231403061 is about 15211.9381079467. The cubic root of 231403061 is about 613.9359050963.

Adding to 231403061 its reverse (160304132), we get a palindrome (391707193).

The spelling of 231403061 in words is "two hundred thirty-one million, four hundred three thousand, sixty-one".