240431253 has 4 divisors (see below), whose sum is σ = 320575008. Its totient is φ = 160287500.

The previous prime is 240431237. The next prime is 240431287. The reversal of 240431253 is 352134042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240431253 - 2⁴ = 240431237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240431293) 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, 40071873 + ... + 40071878.

It is an arithmetic number, because the mean of its divisors is an integer number (80143752).

Almost surely, 2^240431253 is an apocalyptic number.

It is an amenable number.

240431253 is a deficient number, since it is larger than the sum of its proper divisors (80143755).

240431253 is an equidigital number, since it uses as much as digits as its factorization.

240431253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80143754.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 240431253 is about 15505.8457686126. The cubic root of 240431253 is about 621.8185016153.

Adding to 240431253 its reverse (352134042), we get a palindrome (592565295).

The spelling of 240431253 in words is "two hundred forty million, four hundred thirty-one thousand, two hundred fifty-three".