2521384489 has 4 divisors (see below), whose sum is σ = 2715337156. Its totient is φ = 2327431824.

The previous prime is 2521384471. The next prime is 2521384519. The reversal of 2521384489 is 9844831252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1471106025 + 1050278464 = 38355^2 + 32408^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521384489 - 2⁵ = 2521384457 is a prime.

It is a super-2 number, since 2×2521384489² = 12714759482739582242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521384469) 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, 96976314 + ... + 96976339.

It is an arithmetic number, because the mean of its divisors is an integer number (678834289).

Almost surely, 2^2521384489 is an apocalyptic number.

It is an amenable number.

2521384489 is a deficient number, since it is larger than the sum of its proper divisors (193952667).

2521384489 is a wasteful number, since it uses less digits than its factorization.

2521384489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193952666.

The product of its digits is 552960, while the sum is 46.

The square root of 2521384489 is about 50213.3895390463. The cubic root of 2521384489 is about 1361.0675889596.

The spelling of 2521384489 in words is "two billion, five hundred twenty-one million, three hundred eighty-four thousand, four hundred eighty-nine".