2557189903 has 2 divisors, whose sum is σ = 2557189904. Its totient is φ = 2557189902.

The previous prime is 2557189891. The next prime is 2557189909. The reversal of 2557189903 is 3099817552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2557189903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557189909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278594951 + 1278594952.

It is an arithmetic number, because the mean of its divisors is an integer number (1278594952).

Almost surely, 2^2557189903 is an apocalyptic number.

2557189903 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557189903 is an equidigital number, since it uses as much as digits as its factorization.

2557189903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 2557189903 is about 50568.6652285781. The cubic root of 2557189903 is about 1367.4800325952.

The spelling of 2557189903 in words is "two billion, five hundred fifty-seven million, one hundred eighty-nine thousand, nine hundred three".