2501317621 has 8 divisors (see below), whose sum is σ = 2755728288. Its totient is φ = 2251410000.

The previous prime is 2501317607. The next prime is 2501317667. The reversal of 2501317621 is 1267131052.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2501317621 - 2⁵ = 2501317589 is a prime.

It is a super-2 number, since 2×2501317621² = 12513179682250199282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2501317621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501317691) 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 7 ways as a sum of consecutive naturals, for example, 1124595 + ... + 1126816.

It is an arithmetic number, because the mean of its divisors is an integer number (344466036).

Almost surely, 2^2501317621 is an apocalyptic number.

It is an amenable number.

2501317621 is a deficient number, since it is larger than the sum of its proper divisors (254410667).

2501317621 is a wasteful number, since it uses less digits than its factorization.

2501317621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251523.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 2501317621 is about 50013.1744743323. The cubic root of 2501317621 is about 1357.4472046638.

Adding to 2501317621 its reverse (1267131052), we get a palindrome (3768448673).

It can be divided in two parts, 250131 and 7621, that added together give a palindrome (257752).

The spelling of 2501317621 in words is "two billion, five hundred one million, three hundred seventeen thousand, six hundred twenty-one".