2581313 has 8 divisors (see below), whose sum is σ = 3078528. Its totient is φ = 2116224.

The previous prime is 2581289. The next prime is 2581349. The reversal of 2581313 is 3131852.

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 2581313 - 2¹⁰ = 2580289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2581373) 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, 7856 + ... + 8177.

It is an arithmetic number, because the mean of its divisors is an integer number (384816).

2^2581313 is an apocalyptic number.

2581313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2581313 is a deficient number, since it is larger than the sum of its proper divisors (497215).

2581313 is a wasteful number, since it uses less digits than its factorization.

2581313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16063.

The product of its digits is 720, while the sum is 23.

The square root of 2581313 is about 1606.6465074807. The cubic root of 2581313 is about 137.1766595229.

The spelling of 2581313 in words is "two million, five hundred eighty-one thousand, three hundred thirteen".