403240231 has 4 divisors (see below), whose sum is σ = 403444152. Its totient is φ = 403036312.

The previous prime is 403240223. The next prime is 403240241. The reversal of 403240231 is 132042304.

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

It is a cyclic number.

It is not a de Polignac number, because 403240231 - 2³ = 403240223 is a prime.

It is a super-2 number, since 2×403240231² = 325205367793866722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403240199 and 403240208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403240241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98965 + ... + 102958.

It is an arithmetic number, because the mean of its divisors is an integer number (100861038).

Almost surely, 2^403240231 is an apocalyptic number.

403240231 is a deficient number, since it is larger than the sum of its proper divisors (203921).

403240231 is a wasteful number, since it uses less digits than its factorization.

403240231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203920.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 403240231 is about 20080.8423877087. The cubic root of 403240231 is about 738.7904705350.

Adding to 403240231 its reverse (132042304), we get a palindrome (535282535).

The spelling of 403240231 in words is "four hundred three million, two hundred forty thousand, two hundred thirty-one".