2500021003 has 4 divisors (see below), whose sum is σ = 2647081080. Its totient is φ = 2352960928.

The previous prime is 2500020977. The next prime is 2500021091. The reversal of 2500021003 is 3001200052.

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-2500021003 is a prime.

It is a super-2 number, since 2×2500021003² = 12500210030882252018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2500021093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73530013 + ... + 73530046.

It is an arithmetic number, because the mean of its divisors is an integer number (661770270).

Almost surely, 2^2500021003 is an apocalyptic number.

2500021003 is a deficient number, since it is larger than the sum of its proper divisors (147060077).

2500021003 is a wasteful number, since it uses less digits than its factorization.

2500021003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147060076.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 2500021003 is about 50000.2100295589. The cubic root of 2500021003 is about 1357.2126090144.

Adding to 2500021003 its reverse (3001200052), we get a palindrome (5501221055).

The spelling of 2500021003 in words is "two billion, five hundred million, twenty-one thousand, three".