2164431044 has 6 divisors (see below), whose sum is σ = 3787754334. Its totient is φ = 1082215520.

The previous prime is 2164431043. The next prime is 2164431091. The reversal of 2164431044 is 4401344612.

It can be written as a sum of positive squares in only one way, i.e., 1917564100 + 246866944 = 43790^2 + 15712^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2164430998 and 2164431016.

It is not an unprimeable number, because it can be changed into a prime (2164431043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270553877 + ... + 270553884.

It is an arithmetic number, because the mean of its divisors is an integer number (631292389).

Almost surely, 2^2164431044 is an apocalyptic number.

It is an amenable number.

2164431044 is a deficient number, since it is larger than the sum of its proper divisors (1623323290).

2164431044 is a wasteful number, since it uses less digits than its factorization.

2164431044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541107765 (or 541107763 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 2164431044 is about 46523.4461750202. The cubic root of 2164431044 is about 1293.5441357304.

Adding to 2164431044 its reverse (4401344612), we get a palindrome (6565775656).

The spelling of 2164431044 in words is "two billion, one hundred sixty-four million, four hundred thirty-one thousand, forty-four".