2521819369 has 2 divisors, whose sum is σ = 2521819370. Its totient is φ = 2521819368.

The previous prime is 2521819367. The next prime is 2521819373. The reversal of 2521819369 is 9639181252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1845819369 + 676000000 = 42963^2 + 26000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521819369 - 2¹ = 2521819367 is a prime.

It is a super-2 number, since 2×2521819369² = 12719145859727116322, which contains 22 as substring.

Together with 2521819367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2521819367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260909684 + 1260909685.

It is an arithmetic number, because the mean of its divisors is an integer number (1260909685).

Almost surely, 2^2521819369 is an apocalyptic number.

It is an amenable number.

2521819369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521819369 is an equidigital number, since it uses as much as digits as its factorization.

2521819369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 2521819369 is about 50217.7196714467. The cubic root of 2521819369 is about 1361.1458352629.

The spelling of 2521819369 in words is "two billion, five hundred twenty-one million, eight hundred nineteen thousand, three hundred sixty-nine".