2505505403 has 4 divisors (see below), whose sum is σ = 2525233920. Its totient is φ = 2485776888.

The previous prime is 2505505337. The next prime is 2505505417. The reversal of 2505505403 is 3045055052.

It is a happy number.

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 2505505403 - 2²⁰ = 2504456827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505505003) 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, 9864068 + ... + 9864321.

It is an arithmetic number, because the mean of its divisors is an integer number (631308480).

Almost surely, 2^2505505403 is an apocalyptic number.

2505505403 is a deficient number, since it is larger than the sum of its proper divisors (19728517).

2505505403 is a wasteful number, since it uses less digits than its factorization.

2505505403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19728516.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 2505505403 is about 50055.0237538651. The cubic root of 2505505403 is about 1358.2043420720.

The spelling of 2505505403 in words is "two billion, five hundred five million, five hundred five thousand, four hundred three".