3181486725 has 36 divisors (see below), whose sum is σ = 5703583236. Its totient is φ = 1695248640.

The previous prime is 3181486697. The next prime is 3181486733. The reversal of 3181486725 is 5276841813.

It can be written as a sum of positive squares in 6 ways, for example, as 300051684 + 2881435041 = 17322^2 + 53679^2 .

It is not a de Polignac number, because 3181486725 - 2⁹ = 3181486213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 267097 + ... + 278753.

Almost surely, 2^3181486725 is an apocalyptic number.

It is an amenable number.

3181486725 is a deficient number, since it is larger than the sum of its proper divisors (2522096511).

3181486725 is a wasteful number, since it uses less digits than its factorization.

3181486725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12886 (or 12878 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 3181486725 is about 56404.6693545845. The cubic root of 3181486725 is about 1470.7652894251.

The spelling of 3181486725 in words is "three billion, one hundred eighty-one million, four hundred eighty-six thousand, seven hundred twenty-five".