2585723251 has 4 divisors (see below), whose sum is σ = 2585903392. Its totient is φ = 2585543112.

The previous prime is 2585723233. The next prime is 2585723263. The reversal of 2585723251 is 1523275852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2585723251 - 2⁵ = 2585723219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2585723351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66480 + ... + 97933.

It is an arithmetic number, because the mean of its divisors is an integer number (646475848).

Almost surely, 2^2585723251 is an apocalyptic number.

2585723251 is a deficient number, since it is larger than the sum of its proper divisors (180141).

2585723251 is a wasteful number, since it uses less digits than its factorization.

2585723251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180140.

The product of its digits is 168000, while the sum is 40.

The square root of 2585723251 is about 50850.0073844636. The cubic root of 2585723251 is about 1372.5473855768.

The spelling of 2585723251 in words is "two billion, five hundred eighty-five million, seven hundred twenty-three thousand, two hundred fifty-one".