2557317 has 16 divisors (see below), whose sum is σ = 3981312. Its totient is φ = 1429680.

The previous prime is 2557297. The next prime is 2557333. The reversal of 2557317 is 7137552.

It is not a de Polignac number, because 2557317 - 2¹⁴ = 2540933 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557337) 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, 309 + ... + 2282.

It is an arithmetic number, because the mean of its divisors is an integer number (248832).

2^2557317 is an apocalyptic number.

It is an amenable number.

2557317 is a deficient number, since it is larger than the sum of its proper divisors (1423995).

2557317 is a wasteful number, since it uses less digits than its factorization.

2557317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648.

The product of its digits is 7350, while the sum is 30.

The square root of 2557317 is about 1599.1613427044. The cubic root of 2557317 is about 136.7502687637.

The spelling of 2557317 in words is "two million, five hundred fifty-seven thousand, three hundred seventeen".