2521214821 has 8 divisors (see below), whose sum is σ = 2536660800. Its totient is φ = 2505784320.

The previous prime is 2521214819. The next prime is 2521214827. The reversal of 2521214821 is 1284121252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2521214821 - 2¹ = 2521214819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2521214821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521214827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593776 + ... + 598006.

It is an arithmetic number, because the mean of its divisors is an integer number (317082600).

Almost surely, 2^2521214821 is an apocalyptic number.

It is an amenable number.

2521214821 is a deficient number, since it is larger than the sum of its proper divisors (15445979).

2521214821 is a wasteful number, since it uses less digits than its factorization.

2521214821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739.

The product of its digits is 2560, while the sum is 28.

The square root of 2521214821 is about 50211.7000409267. The cubic root of 2521214821 is about 1361.0370588022.

The spelling of 2521214821 in words is "two billion, five hundred twenty-one million, two hundred fourteen thousand, eight hundred twenty-one".