240543431 has 4 divisors (see below), whose sum is σ = 240621600. Its totient is φ = 240465264.

The previous prime is 240543349. The next prime is 240543437. The reversal of 240543431 is 134345042.

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 240543431 - 2¹⁸ = 240281287 is a prime.

It is a super-2 number, since 2×240543431² = 115722284394503522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240543431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240543437) 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, 34271 + ... + 40688.

It is an arithmetic number, because the mean of its divisors is an integer number (60155400).

Almost surely, 2^240543431 is an apocalyptic number.

240543431 is a deficient number, since it is larger than the sum of its proper divisors (78169).

240543431 is an equidigital number, since it uses as much as digits as its factorization.

240543431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78168.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 240543431 is about 15509.4626276993. The cubic root of 240543431 is about 621.9151938567.

Adding to 240543431 its reverse (134345042), we get a palindrome (374888473).

The spelling of 240543431 in words is "two hundred forty million, five hundred forty-three thousand, four hundred thirty-one".