2553603 has 16 divisors (see below), whose sum is σ = 3758496. Its totient is φ = 1532160.

The previous prime is 2553601. The next prime is 2553611. The reversal of 2553603 is 3063552.

It is a Cunningham number, because it is equal to 1598²-1.

It is not a de Polignac number, because 2553603 - 2¹ = 2553601 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2553601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 801 + ... + 2397.

It is an arithmetic number, because the mean of its divisors is an integer number (234906).

2^2553603 is an apocalyptic number.

2553603 is a deficient number, since it is larger than the sum of its proper divisors (1204893).

2553603 is a wasteful number, since it uses less digits than its factorization.

2553603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 2553603 is about 1597.9996871089. Note that the first 3 decimals coincide. The cubic root of 2553603 is about 136.6840357328.

It can be divided in two parts, 25 and 53603, that added together give a triangular number (53628 = T₃₂₇).

The spelling of 2553603 in words is "two million, five hundred fifty-three thousand, six hundred three".