2521246817 has 4 divisors (see below), whose sum is σ = 2522948400. Its totient is φ = 2519545236.

The previous prime is 2521246811. The next prime is 2521246837. The reversal of 2521246817 is 7186421252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2521246817 - 2⁶ = 2521246753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521246811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848567 + ... + 851532.

It is an arithmetic number, because the mean of its divisors is an integer number (630737100).

Almost surely, 2^2521246817 is an apocalyptic number.

It is an amenable number.

2521246817 is a deficient number, since it is larger than the sum of its proper divisors (1701583).

2521246817 is a wasteful number, since it uses less digits than its factorization.

2521246817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701582.

The product of its digits is 53760, while the sum is 38.

The square root of 2521246817 is about 50212.0186509166. The cubic root of 2521246817 is about 1361.0428162856.

The spelling of 2521246817 in words is "two billion, five hundred twenty-one million, two hundred forty-six thousand, eight hundred seventeen".