2521628917 has 2 divisors, whose sum is σ = 2521628918. Its totient is φ = 2521628916.

The previous prime is 2521628911. The next prime is 2521628929. The reversal of 2521628917 is 7198261252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1480017841 + 1041611076 = 38471^2 + 32274^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521628917 - 2¹¹ = 2521626869 is a prime.

It is a super-2 number, since 2×2521628917² = 12717224790101185778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521628911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260814458 + 1260814459.

It is an arithmetic number, because the mean of its divisors is an integer number (1260814459).

Almost surely, 2^2521628917 is an apocalyptic number.

It is an amenable number.

2521628917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521628917 is an equidigital number, since it uses as much as digits as its factorization.

2521628917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 2521628917 is about 50215.8233727179. The cubic root of 2521628917 is about 1361.1115690666. Note that the first 3 decimals are identical.

The spelling of 2521628917 in words is "two billion, five hundred twenty-one million, six hundred twenty-eight thousand, nine hundred seventeen".