2557531 has 16 divisors (see below), whose sum is σ = 2930688. Its totient is φ = 2217600.

The previous prime is 2557519. The next prime is 2557553. The reversal of 2557531 is 1357552.

2557531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2557531 - 2¹⁹ = 2033243 is a prime.

It is a super-2 number, since 2×2557531² = 13081929631922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2557531.

It is not an unprimeable number, because it can be changed into a prime (2557501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12016 + ... + 12226.

It is an arithmetic number, because the mean of its divisors is an integer number (183168).

2^2557531 is an apocalyptic number.

2557531 is a deficient number, since it is larger than the sum of its proper divisors (373157).

2557531 is a wasteful number, since it uses less digits than its factorization.

2557531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282.

The product of its digits is 5250, while the sum is 28.

The square root of 2557531 is about 1599.2282513763. The cubic root of 2557531 is about 136.7540831443.

The spelling of 2557531 in words is "two million, five hundred fifty-seven thousand, five hundred thirty-one".