240520503 has 4 divisors (see below), whose sum is σ = 320694008. Its totient is φ = 160347000.

The previous prime is 240520493. The next prime is 240520513. The reversal of 240520503 is 305025042.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (240520493) and next prime (240520513).

It is not a de Polignac number, because 240520503 - 2⁶ = 240520439 is a prime.

It is a super-2 number, since 2×240520503² = 115700224726746018, 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 240520503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240520513) 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, 40086748 + ... + 40086753.

It is an arithmetic number, because the mean of its divisors is an integer number (80173502).

Almost surely, 2^240520503 is an apocalyptic number.

240520503 is a deficient number, since it is larger than the sum of its proper divisors (80173505).

240520503 is an equidigital number, since it uses as much as digits as its factorization.

240520503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80173504.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 240520503 is about 15508.7234484338. The cubic root of 240520503 is about 621.8954334271.

Adding to 240520503 its reverse (305025042), we get a palindrome (545545545).

The spelling of 240520503 in words is "two hundred forty million, five hundred twenty thousand, five hundred three".