2505523 has 4 divisors (see below), whose sum is σ = 2558880. Its totient is φ = 2452168.

The previous prime is 2505499. The next prime is 2505527. The reversal of 2505523 is 3255052.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505523 is a prime.

It is a Duffinian number.

2505523 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2505494 and 2505503.

It is not an unprimeable number, because it can be changed into a prime (2505527) 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, 26608 + ... + 26701.

It is an arithmetic number, because the mean of its divisors is an integer number (639720).

2^2505523 is an apocalyptic number.

2505523 is a deficient number, since it is larger than the sum of its proper divisors (53357).

2505523 is an equidigital number, since it uses as much as digits as its factorization.

2505523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53356.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 2505523 is about 1582.8843924937. The cubic root of 2505523 is about 135.8207521772.

The spelling of 2505523 in words is "two million, five hundred five thousand, five hundred twenty-three".