531011441 has 4 divisors (see below), whose sum is σ = 531247332. Its totient is φ = 530775552.

The previous prime is 531011407. The next prime is 531011443. The reversal of 531011441 is 144110135.

It is a happy number.

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 374035600 + 156975841 = 19340^2 + 12529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531011441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (531011443) 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, 114536 + ... + 119081.

It is an arithmetic number, because the mean of its divisors is an integer number (132811833).

Almost surely, 2^531011441 is an apocalyptic number.

It is an amenable number.

531011441 is a deficient number, since it is larger than the sum of its proper divisors (235891).

531011441 is a wasteful number, since it uses less digits than its factorization.

531011441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235890.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 531011441 is about 23043.6854908237. The cubic root of 531011441 is about 809.7817025920.

Adding to 531011441 its reverse (144110135), we get a palindrome (675121576).

The spelling of 531011441 in words is "five hundred thirty-one million, eleven thousand, four hundred forty-one".