2521319819 has 4 divisors (see below), whose sum is σ = 2535894096. Its totient is φ = 2506745544.

The previous prime is 2521319809. The next prime is 2521319821. The reversal of 2521319819 is 9189131252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2521319819 - 2⁴ = 2521319803 is a prime.

It is a super-2 number, since 2×2521319819² = 12714107259364385522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521319809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7286879 + ... + 7287224.

It is an arithmetic number, because the mean of its divisors is an integer number (633973524).

Almost surely, 2^2521319819 is an apocalyptic number.

2521319819 is a deficient number, since it is larger than the sum of its proper divisors (14574277).

2521319819 is a wasteful number, since it uses less digits than its factorization.

2521319819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14574276.

The product of its digits is 38880, while the sum is 41.

The square root of 2521319819 is about 50212.7455831684. The cubic root of 2521319819 is about 1361.0559523641.

The spelling of 2521319819 in words is "two billion, five hundred twenty-one million, three hundred nineteen thousand, eight hundred nineteen".