2156603306 has 32 divisors (see below), whose sum is σ = 4024012608. Its totient is φ = 851639040.

The previous prime is 2156603287. The next prime is 2156603311. The reversal of 2156603306 is 6033066512.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 216920 + ... + 226643.

It is an arithmetic number, because the mean of its divisors is an integer number (125750394).

Almost surely, 2^2156603306 is an apocalyptic number.

2156603306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2156603306 is a deficient number, since it is larger than the sum of its proper divisors (1867409302).

2156603306 is a wasteful number, since it uses less digits than its factorization.

2156603306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443606.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 2156603306 is about 46439.2431678209. The cubic root of 2156603306 is about 1291.9828700678.

Adding to 2156603306 its reverse (6033066512), we get a palindrome (8189669818).

The spelling of 2156603306 in words is "two billion, one hundred fifty-six million, six hundred three thousand, three hundred six".