503240641 has 4 divisors (see below), whose sum is σ = 507694212. Its totient is φ = 498787072.

The previous prime is 503240603. The next prime is 503240651. The reversal of 503240641 is 146042305.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146042305 = 5 ⋅29208461.

It can be written as a sum of positive squares in 2 ways, for example, as 156350016 + 346890625 = 12504^2 + 18625^2 .

It is a cyclic number.

It is not a de Polignac number, because 503240641 - 2⁷ = 503240513 is a prime.

It is a super-2 number, since 2×503240641² = 506502285508181762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503240651) 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, 2226616 + ... + 2226841.

It is an arithmetic number, because the mean of its divisors is an integer number (126923553).

Almost surely, 2^503240641 is an apocalyptic number.

It is an amenable number.

503240641 is a deficient number, since it is larger than the sum of its proper divisors (4453571).

503240641 is a wasteful number, since it uses less digits than its factorization.

503240641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453570.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 503240641 is about 22433.0256764441. The cubic root of 503240641 is about 795.4115670220.

Adding to 503240641 its reverse (146042305), we get a palindrome (649282946).

The spelling of 503240641 in words is "five hundred three million, two hundred forty thousand, six hundred forty-one".