2581365205 has 8 divisors (see below), whose sum is σ = 3098714112. Its totient is φ = 2064374928.

The previous prime is 2581365203. The next prime is 2581365253. The reversal of 2581365205 is 5025631852.

It is a happy number.

2581365205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2581365205 - 2¹ = 2581365203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581365203) 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, 73557 + ... + 102826.

It is an arithmetic number, because the mean of its divisors is an integer number (387339264).

Almost surely, 2^2581365205 is an apocalyptic number.

It is an amenable number.

2581365205 is a deficient number, since it is larger than the sum of its proper divisors (517348907).

2581365205 is a wasteful number, since it uses less digits than its factorization.

2581365205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179315.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 2581365205 is about 50807.1373430938. The cubic root of 2581365205 is about 1371.7758427960.

The spelling of 2581365205 in words is "two billion, five hundred eighty-one million, three hundred sixty-five thousand, two hundred five".