2125521247 has 2 divisors, whose sum is σ = 2125521248. Its totient is φ = 2125521246.

The previous prime is 2125521227. The next prime is 2125521253. The reversal of 2125521247 is 7421255212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2125521247 - 2²³ = 2117132639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125521227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062760623 + 1062760624.

It is an arithmetic number, because the mean of its divisors is an integer number (1062760624).

Almost surely, 2^2125521247 is an apocalyptic number.

2125521247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125521247 is an equidigital number, since it uses as much as digits as its factorization.

2125521247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 31.

The square root of 2125521247 is about 46103.3756573204. The cubic root of 2125521247 is about 1285.7459061718.

Adding to 2125521247 its reverse (7421255212), we get a palindrome (9546776459).

The spelling of 2125521247 in words is "two billion, one hundred twenty-five million, five hundred twenty-one thousand, two hundred forty-seven".