2585515000 has 80 divisors (see below), whose sum is σ = 6078679200. Its totient is φ = 1030656000.

The previous prime is 2585514991. The next prime is 2585515021. The reversal of 2585515000 is 5155852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1834296 + ... + 1835704.

It is an arithmetic number, because the mean of its divisors is an integer number (75983490).

Almost surely, 2^2585515000 is an apocalyptic number.

2585515000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2585515000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3039339600).

2585515000 is an abundant number, since it is smaller than the sum of its proper divisors (3493164200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2585515000 is a wasteful number, since it uses less digits than its factorization.

2585515000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802 (or 1783 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 31.

The square root of 2585515000 is about 50847.9596444144. The cubic root of 2585515000 is about 1372.5105368229.

The spelling of 2585515000 in words is "two billion, five hundred eighty-five million, five hundred fifteen thousand".