240405231 has 8 divisors (see below), whose sum is σ = 349680384. Its totient is φ = 145700120.

The previous prime is 240405229. The next prime is 240405251. The reversal of 240405231 is 132504042.

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

It is a cyclic number.

It is not a de Polignac number, because 240405231 - 2¹ = 240405229 is a prime.

It is a super-2 number, since 2×240405231² = 115589350184326722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 240405198 and 240405207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240405251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3642471 + ... + 3642536.

It is an arithmetic number, because the mean of its divisors is an integer number (43710048).

Almost surely, 2^240405231 is an apocalyptic number.

240405231 is a deficient number, since it is larger than the sum of its proper divisors (109275153).

240405231 is a wasteful number, since it uses less digits than its factorization.

240405231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7285021.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 240405231 is about 15505.0066430170. The cubic root of 240405231 is about 621.7960675590.

Adding to 240405231 its reverse (132504042), we get a palindrome (372909273).

It can be divided in two parts, 240405 and 231, that multiplied together give a palindrome (55533555).

The spelling of 240405231 in words is "two hundred forty million, four hundred five thousand, two hundred thirty-one".