2506755521 has 2 divisors, whose sum is σ = 2506755522. Its totient is φ = 2506755520.

The previous prime is 2506755497. The next prime is 2506755523. The reversal of 2506755521 is 1255576052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2252831296 + 253924225 = 47464^2 + 15935^2 .

It is a cyclic number.

It is not a de Polignac number, because 2506755521 - 2¹⁸ = 2506493377 is a prime.

Together with 2506755523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2506755523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253377760 + 1253377761.

It is an arithmetic number, because the mean of its divisors is an integer number (1253377761).

Almost surely, 2^2506755521 is an apocalyptic number.

It is an amenable number.

2506755521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2506755521 is an equidigital number, since it uses as much as digits as its factorization.

2506755521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 38.

The square root of 2506755521 is about 50067.5096344925. The cubic root of 2506755521 is about 1358.4301958234.

The spelling of 2506755521 in words is "two billion, five hundred six million, seven hundred fifty-five thousand, five hundred twenty-one".