2155603 has 2 divisors, whose sum is σ = 2155604. Its totient is φ = 2155602.

The previous prime is 2155597. The next prime is 2155609. The reversal of 2155603 is 3065512.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2155597) and next prime (2155609).

It is a cyclic number.

It is not a de Polignac number, because 2155603 - 2¹⁷ = 2024531 is a prime.

It is not a weakly prime, because it can be changed into another prime (2155609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077801 + 1077802.

It is an arithmetic number, because the mean of its divisors is an integer number (1077802).

2^2155603 is an apocalyptic number.

2155603 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155603 is an equidigital number, since it uses as much as digits as its factorization.

2155603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2155603 is about 1468.1971938401. The cubic root of 2155603 is about 129.1783083969.

Subtracting 2155603 from its reverse (3065512), we obtain a palindrome (909909).

The spelling of 2155603 in words is "two million, one hundred fifty-five thousand, six hundred three".