2563881 has 8 divisors (see below), whose sum is σ = 3466944. Its totient is φ = 1685040.

The previous prime is 2563877. The next prime is 2563901. The reversal of 2563881 is 1883652.

It is a happy number.

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

It is not a de Polignac number, because 2563881 - 2² = 2563877 is a prime.

It is a super-2 number, since 2×2563881² = 13146971564322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5806 + ... + 6231.

It is an arithmetic number, because the mean of its divisors is an integer number (433368).

2^2563881 is an apocalyptic number.

It is an amenable number.

2563881 is a deficient number, since it is larger than the sum of its proper divisors (903063).

2563881 is a wasteful number, since it uses less digits than its factorization.

2563881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12111.

The product of its digits is 11520, while the sum is 33.

The square root of 2563881 is about 1601.2123531874. The cubic root of 2563881 is about 136.8671701699.

The spelling of 2563881 in words is "two million, five hundred sixty-three thousand, eight hundred eighty-one".