25203005 has 4 divisors (see below), whose sum is σ = 30243612. Its totient is φ = 20162400.

The previous prime is 25202999. The next prime is 25203007. The reversal of 25203005 is 50030252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19945156 + 5257849 = 4466^2 + 2293^2 .

It is not a de Polignac number, because 25203005 - 2¹⁴ = 25186621 is a prime.

It is a super-2 number, since 2×25203005² = 1270382922060050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25203007) 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, 2520296 + ... + 2520305.

It is an arithmetic number, because the mean of its divisors is an integer number (7560903).

Almost surely, 2^25203005 is an apocalyptic number.

It is an amenable number.

25203005 is a deficient number, since it is larger than the sum of its proper divisors (5040607).

25203005 is an equidigital number, since it uses as much as digits as its factorization.

25203005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040606.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 25203005 is about 5020.2594554465. The cubic root of 25203005 is about 293.1910948075.

Adding to 25203005 its reverse (50030252), we get a palindrome (75233257).

The spelling of 25203005 in words is "twenty-five million, two hundred three thousand, five".