4431240545 has 4 divisors (see below), whose sum is σ = 5317488660. Its totient is φ = 3544992432.

The previous prime is 4431240529. The next prime is 4431240557. The reversal of 4431240545 is 5450421344.

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 1940931136 + 2490309409 = 44056^2 + 49903^2 .

It is a cyclic number.

It is not a de Polignac number, because 4431240545 - 2⁴ = 4431240529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443124050 + ... + 443124059.

It is an arithmetic number, because the mean of its divisors is an integer number (1329372165).

Almost surely, 2^4431240545 is an apocalyptic number.

It is an amenable number.

4431240545 is a deficient number, since it is larger than the sum of its proper divisors (886248115).

4431240545 is an equidigital number, since it uses as much as digits as its factorization.

4431240545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886248114.

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 4431240545 is about 66567.5637604382. The cubic root of 4431240545 is about 1642.5115870334.

Adding to 4431240545 its reverse (5450421344), we get a palindrome (9881661889).

The spelling of 4431240545 in words is "four billion, four hundred thirty-one million, two hundred forty thousand, five hundred forty-five".