2581016 has 8 divisors (see below), whose sum is σ = 4839420. Its totient is φ = 1290504.

The previous prime is 2581013. The next prime is 2581027. The reversal of 2581016 is 6101852.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2580982 and 2581000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161306 + ... + 161321.

2^2581016 is an apocalyptic number.

It is an amenable number.

2581016 is a deficient number, since it is larger than the sum of its proper divisors (2258404).

2581016 is a wasteful number, since it uses less digits than its factorization.

2581016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322633 (or 322629 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2581016 is about 1606.5540762763. The cubic root of 2581016 is about 137.1713982430.

Adding to 2581016 its reverse (6101852), we get a palindrome (8682868).

The spelling of 2581016 in words is "two million, five hundred eighty-one thousand, sixteen".