2563422581 has 8 divisors (see below), whose sum is σ = 2689494528. Its totient is φ = 2440062000.

The previous prime is 2563422577. The next prime is 2563422583. The reversal of 2563422581 is 1852243652.

It is a happy number.

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 2563422581 - 2² = 2563422577 is a prime.

It is a super-2 number, since 2×2563422581² = 13142270657561403122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563422583) 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, 675905 + ... + 679686.

It is an arithmetic number, because the mean of its divisors is an integer number (336186816).

Almost surely, 2^2563422581 is an apocalyptic number.

It is an amenable number.

2563422581 is a deficient number, since it is larger than the sum of its proper divisors (126071947).

2563422581 is a wasteful number, since it uses less digits than its factorization.

2563422581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355683.

The product of its digits is 115200, while the sum is 38.

The square root of 2563422581 is about 50630.2536138226. The cubic root of 2563422581 is about 1368.5901245235.

The spelling of 2563422581 in words is "two billion, five hundred sixty-three million, four hundred twenty-two thousand, five hundred eighty-one".