5551603 has 2 divisors, whose sum is σ = 5551604. Its totient is φ = 5551602.

The previous prime is 5551589. The next prime is 5551607. The reversal of 5551603 is 3061555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5551603 - 2¹⁷ = 5420531 is a prime.

5551603 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5551607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775801 + 2775802.

It is an arithmetic number, because the mean of its divisors is an integer number (2775802).

Almost surely, 2^5551603 is an apocalyptic number.

5551603 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551603 is an equidigital number, since it uses as much as digits as its factorization.

5551603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 5551603 is about 2356.1839911178. The cubic root of 5551603 is about 177.0677493952.

The spelling of 5551603 in words is "five million, five hundred fifty-one thousand, six hundred three".