3181387146 has 16 divisors (see below), whose sum is σ = 7271742144. Its totient is φ = 908967744.

The previous prime is 3181387141. The next prime is 3181387159. The reversal of 3181387146 is 6417831813.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 75747313 = 3181387146 / (3 + 1 + 8 + 1 + 3 + 8 + 7 + 1 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 3181387098 and 3181387107.

It is not an unprimeable number, because it can be changed into a prime (3181387141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37873615 + ... + 37873698.

It is an arithmetic number, because the mean of its divisors is an integer number (454483884).

Almost surely, 2^3181387146 is an apocalyptic number.

3181387146 is an abundant number, since it is smaller than the sum of its proper divisors (4090354998).

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

3181387146 is a wasteful number, since it uses less digits than its factorization.

3181387146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75747325.

The product of its digits is 96768, while the sum is 42.

The square root of 3181387146 is about 56403.7866282043. The cubic root of 3181387146 is about 1470.7499445170.

The spelling of 3181387146 in words is "three billion, one hundred eighty-one million, three hundred eighty-seven thousand, one hundred forty-six".