25000002503 has 4 divisors (see below), whose sum is σ = 28571431440. Its totient is φ = 21428573568.

The previous prime is 25000002493. The next prime is 25000002529. The reversal of 25000002503 is 30520000052.

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 25000002503 - 2⁶ = 25000002439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25080002503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785714458 + ... + 1785714471.

It is an arithmetic number, because the mean of its divisors is an integer number (7142857860).

Almost surely, 2^25000002503 is an apocalyptic number.

25000002503 is a deficient number, since it is larger than the sum of its proper divisors (3571428937).

25000002503 is an equidigital number, since it uses as much as digits as its factorization.

25000002503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571428936.

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

Adding to 25000002503 its reverse (30520000052), we get a palindrome (55520002555).

The spelling of 25000002503 in words is "twenty-five billion, two thousand, five hundred three".