2578231725 has 24 divisors (see below), whose sum is σ = 4264584192. Its totient is φ = 1374441600.

The previous prime is 2578231697. The next prime is 2578231727. The reversal of 2578231725 is 5271328752.

It is not a de Polignac number, because 2578231725 - 2¹⁵ = 2578198957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578231727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197140 + ... + 209810.

It is an arithmetic number, because the mean of its divisors is an integer number (177691008).

Almost surely, 2^2578231725 is an apocalyptic number.

2578231725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2578231725 is a deficient number, since it is larger than the sum of its proper divisors (1686352467).

2578231725 is a wasteful number, since it uses less digits than its factorization.

2578231725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15397 (or 15392 counting only the distinct ones).

The product of its digits is 235200, while the sum is 42.

The square root of 2578231725 is about 50776.2909732485. The cubic root of 2578231725 is about 1371.2205587676.

The spelling of 2578231725 in words is "two billion, five hundred seventy-eight million, two hundred thirty-one thousand, seven hundred twenty-five".