2500312621 has 4 divisors (see below), whose sum is σ = 2647389852. Its totient is φ = 2353235392.

The previous prime is 2500312613. The next prime is 2500312631. The reversal of 2500312621 is 1262130052.

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 720654025 + 1779658596 = 26845^2 + 42186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500312621 - 2³ = 2500312613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2500312592 and 2500312601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500312631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73538590 + ... + 73538623.

It is an arithmetic number, because the mean of its divisors is an integer number (661847463).

Almost surely, 2^2500312621 is an apocalyptic number.

It is an amenable number.

2500312621 is a deficient number, since it is larger than the sum of its proper divisors (147077231).

2500312621 is a wasteful number, since it uses less digits than its factorization.

2500312621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147077230.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2500312621 is about 50003.1261122742. The cubic root of 2500312621 is about 1357.2653782028.

Adding to 2500312621 its reverse (1262130052), we get a palindrome (3762442673).

The spelling of 2500312621 in words is "two billion, five hundred million, three hundred twelve thousand, six hundred twenty-one".