2521217263 has 4 divisors (see below), whose sum is σ = 2521800280. Its totient is φ = 2520634248.

The previous prime is 2521217233. The next prime is 2521217269. The reversal of 2521217263 is 3627121252.

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 2521217263 - 2²⁵ = 2487662831 is a prime.

It is a super-2 number, since 2×2521217263² = 12713072974498422338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521217269) 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, 284973 + ... + 293686.

It is an arithmetic number, because the mean of its divisors is an integer number (630450070).

Almost surely, 2^2521217263 is an apocalyptic number.

2521217263 is a deficient number, since it is larger than the sum of its proper divisors (583017).

2521217263 is an equidigital number, since it uses as much as digits as its factorization.

2521217263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583016.

The product of its digits is 10080, while the sum is 31.

The square root of 2521217263 is about 50211.7243579625. The cubic root of 2521217263 is about 1361.0374982268.

The spelling of 2521217263 in words is "two billion, five hundred twenty-one million, two hundred seventeen thousand, two hundred sixty-three".