2129157944 has 16 divisors (see below), whose sum is σ = 3993855120. Its totient is φ = 1064129920.

The previous prime is 2129157941. The next prime is 2129157967. The reversal of 2129157944 is 4497519212.

It is a junction number, because it is equal to n+sod(n) for n = 2129157895 and 2129157904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129157941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35537 + ... + 74304.

It is an arithmetic number, because the mean of its divisors is an integer number (249615945).

Almost surely, 2^2129157944 is an apocalyptic number.

It is an amenable number.

2129157944 is a deficient number, since it is larger than the sum of its proper divisors (1864697176).

2129157944 is a wasteful number, since it uses less digits than its factorization.

2129157944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112270 (or 112266 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 2129157944 is about 46142.7994816093. The cubic root of 2129157944 is about 1286.4787780208.

The spelling of 2129157944 in words is "two billion, one hundred twenty-nine million, one hundred fifty-seven thousand, nine hundred forty-four".