2156555603 has 2 divisors, whose sum is σ = 2156555604. Its totient is φ = 2156555602.

The previous prime is 2156555593. The next prime is 2156555617. The reversal of 2156555603 is 3065556512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156555603 - 2⁶ = 2156555539 is a prime.

It is not a weakly prime, because it can be changed into another prime (2156557603) 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 as a sum of consecutive naturals, namely, 1078277801 + 1078277802.

It is an arithmetic number, because the mean of its divisors is an integer number (1078277802).

Almost surely, 2^2156555603 is an apocalyptic number.

2156555603 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156555603 is an equidigital number, since it uses as much as digits as its factorization.

2156555603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 2156555603 is about 46438.7295584192. The cubic root of 2156555603 is about 1291.9733439899.

Subtracting 2156555603 from its reverse (3065556512), we obtain a palindrome (909000909).

The spelling of 2156555603 in words is "two billion, one hundred fifty-six million, five hundred fifty-five thousand, six hundred three".