2149171748 has 24 divisors (see below), whose sum is σ = 3799016760. Its totient is φ = 1063756800.

The previous prime is 2149171711. The next prime is 2149171753. The reversal of 2149171748 is 8471719412.

It can be written as a sum of positive squares in 4 ways, for example, as 187744804 + 1961426944 = 13702^2 + 44288^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2149171699 and 2149171708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827540 + ... + 830132.

It is an arithmetic number, because the mean of its divisors is an integer number (158292365).

Almost surely, 2^2149171748 is an apocalyptic number.

It is an amenable number.

2149171748 is a deficient number, since it is larger than the sum of its proper divisors (1649845012).

2149171748 is a wasteful number, since it uses less digits than its factorization.

2149171748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607 (or 4605 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 2149171748 is about 46359.1603461495. The cubic root of 2149171748 is about 1290.4971238659.

It can be divided in two parts, 21491 and 71748, that added together give a palindrome (93239).

The spelling of 2149171748 in words is "two billion, one hundred forty-nine million, one hundred seventy-one thousand, seven hundred forty-eight".