2557430403 has 16 divisors (see below), whose sum is σ = 3725008896. Its totient is φ = 1547828640.

The previous prime is 2557430371. The next prime is 2557430413. The reversal of 2557430403 is 3040347552.

It is not a de Polignac number, because 2557430403 - 2⁵ = 2557430371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2557430413) 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, 28675 + ... + 77052.

It is an arithmetic number, because the mean of its divisors is an integer number (232813056).

Almost surely, 2^2557430403 is an apocalyptic number.

2557430403 is a deficient number, since it is larger than the sum of its proper divisors (1167578493).

2557430403 is a wasteful number, since it uses less digits than its factorization.

2557430403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106474.

The product of its (nonzero) digits is 50400, while the sum is 33.

The square root of 2557430403 is about 50571.0431274657. The cubic root of 2557430403 is about 1367.5229010889.

Adding to 2557430403 its reverse (3040347552), we get a palindrome (5597777955).

The spelling of 2557430403 in words is "two billion, five hundred fifty-seven million, four hundred thirty thousand, four hundred three".