2557318 has 4 divisors (see below), whose sum is σ = 3835980. Its totient is φ = 1278658.

The previous prime is 2557297. The next prime is 2557333. The reversal of 2557318 is 8137552.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 2557318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639328 + ... + 639331.

It is an arithmetic number, because the mean of its divisors is an integer number (958995).

2^2557318 is an apocalyptic number.

2557318 is a deficient number, since it is larger than the sum of its proper divisors (1278662).

2557318 is a wasteful number, since it uses less digits than its factorization.

2557318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278661.

The product of its digits is 8400, while the sum is 31.

The square root of 2557318 is about 1599.1616553682. The cubic root of 2557318 is about 136.7502865884.

The spelling of 2557318 in words is "two million, five hundred fifty-seven thousand, three hundred eighteen".