2505540403 has 4 divisors (see below), whose sum is σ = 2505842968. Its totient is φ = 2505237840.

The previous prime is 2505540341. The next prime is 2505540409. The reversal of 2505540403 is 3040455052.

2505540403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2505540403 - 2²¹ = 2503443251 is a prime.

It is a super-2 number, since 2×2505540403² = 12555465422130804818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505540409) 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, 138501 + ... + 155542.

It is an arithmetic number, because the mean of its divisors is an integer number (626460742).

Almost surely, 2^2505540403 is an apocalyptic number.

2505540403 is a deficient number, since it is larger than the sum of its proper divisors (302565).

2505540403 is an equidigital number, since it uses as much as digits as its factorization.

2505540403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302564.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 2505540403 is about 50055.3733679013. The cubic root of 2505540403 is about 1358.2106664023.

Adding to 2505540403 its reverse (3040455052), we get a palindrome (5545995455).

The spelling of 2505540403 in words is "two billion, five hundred five million, five hundred forty thousand, four hundred three".