2521622641 has 8 divisors (see below), whose sum is σ = 2692451520. Its totient is φ = 2355893232.

The previous prime is 2521622633. The next prime is 2521622651. The reversal of 2521622641 is 1462261252.

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 2521622641 - 2³ = 2521622633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521622651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273846 + ... + 1275823.

It is an arithmetic number, because the mean of its divisors is an integer number (336556440).

Almost surely, 2^2521622641 is an apocalyptic number.

It is an amenable number.

2521622641 is a deficient number, since it is larger than the sum of its proper divisors (170828879).

2521622641 is a wasteful number, since it uses less digits than its factorization.

2521622641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549735.

The product of its digits is 11520, while the sum is 31.

The square root of 2521622641 is about 50215.7608824162. The cubic root of 2521622641 is about 1361.1104398569.

Adding to 2521622641 its reverse (1462261252), we get a palindrome (3983883893).

The spelling of 2521622641 in words is "two billion, five hundred twenty-one million, six hundred twenty-two thousand, six hundred forty-one".