2156443246 has 16 divisors (see below), whose sum is σ = 3380598144. Its totient is φ = 1029724344.

The previous prime is 2156443241. The next prime is 2156443271. The reversal of 2156443246 is 6423446512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156443241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6876 + ... + 66031.

It is an arithmetic number, because the mean of its divisors is an integer number (211287384).

Almost surely, 2^2156443246 is an apocalyptic number.

2156443246 is a deficient number, since it is larger than the sum of its proper divisors (1224154898).

2156443246 is a wasteful number, since it uses less digits than its factorization.

2156443246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73575.

The product of its digits is 138240, while the sum is 37.

The square root of 2156443246 is about 46437.5198088787. The cubic root of 2156443246 is about 1291.9509062394.

Adding to 2156443246 its reverse (6423446512), we get a palindrome (8579889758).

The spelling of 2156443246 in words is "two billion, one hundred fifty-six million, four hundred forty-three thousand, two hundred forty-six".