2153603 has 4 divisors (see below), whose sum is σ = 2157648. Its totient is φ = 2149560.

The previous prime is 2153563. The next prime is 2153621. The reversal of 2153603 is 3063512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2153603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076 + ... + 2337.

It is an arithmetic number, because the mean of its divisors is an integer number (539412).

2^2153603 is an apocalyptic number.

2153603 is a deficient number, since it is larger than the sum of its proper divisors (4045).

2153603 is an equidigital number, since it uses as much as digits as its factorization.

2153603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 2153603 is about 1467.5159283633. The cubic root of 2153603 is about 129.1383448599.

Subtracting 2153603 from its reverse (3063512), we obtain a palindrome (909909).

The spelling of 2153603 in words is "two million, one hundred fifty-three thousand, six hundred three".