2455187521 has 2 divisors, whose sum is σ = 2455187522. Its totient is φ = 2455187520.

The previous prime is 2455187519. The next prime is 2455187573. The reversal of 2455187521 is 1257815542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1667823921 + 787363600 = 40839^2 + 28060^2 .

It is a cyclic number.

It is not a de Polignac number, because 2455187521 - 2¹ = 2455187519 is a prime.

Together with 2455187519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2455184521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1227593760 + 1227593761.

It is an arithmetic number, because the mean of its divisors is an integer number (1227593761).

Almost surely, 2^2455187521 is an apocalyptic number.

It is an amenable number.

2455187521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2455187521 is an equidigital number, since it uses as much as digits as its factorization.

2455187521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112000, while the sum is 40.

The square root of 2455187521 is about 49549.8488494163. The cubic root of 2455187521 is about 1349.0505479554.

The spelling of 2455187521 in words is "two billion, four hundred fifty-five million, one hundred eighty-seven thousand, five hundred twenty-one".