2551903 has 2 divisors, whose sum is σ = 2551904. Its totient is φ = 2551902.

The previous prime is 2551883. The next prime is 2551933. The reversal of 2551903 is 3091552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2551903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551933) 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, 1275951 + 1275952.

It is an arithmetic number, because the mean of its divisors is an integer number (1275952).

2^2551903 is an apocalyptic number.

2551903 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551903 is an equidigital number, since it uses as much as digits as its factorization.

2551903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 2551903 is about 1597.4676835542. The cubic root of 2551903 is about 136.6536976258.

The spelling of 2551903 in words is "two million, five hundred fifty-one thousand, nine hundred three".