2781327125 has 16 divisors (see below), whose sum is σ = 3494415600. Its totient is φ = 2210113600.

The previous prime is 2781327119. The next prime is 2781327149. The reversal of 2781327125 is 5217231872.

It can be written as a sum of positive squares in 8 ways, for example, as 1732474129 + 1048852996 = 41623^2 + 32386^2 .

It is not a de Polignac number, because 2781327125 - 2⁶ = 2781327061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56042 + ... + 93291.

It is an arithmetic number, because the mean of its divisors is an integer number (218400975).

Almost surely, 2^2781327125 is an apocalyptic number.

2781327125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2781327125 is a deficient number, since it is larger than the sum of its proper divisors (713088475).

2781327125 is a wasteful number, since it uses less digits than its factorization.

2781327125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149497 (or 149487 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 2781327125 is about 52738.2889843802. The cubic root of 2781327125 is about 1406.3195810838.

Adding to 2781327125 its reverse (5217231872), we get a palindrome (7998558997).

The spelling of 2781327125 in words is "two billion, seven hundred eighty-one million, three hundred twenty-seven thousand, one hundred twenty-five".