2566531 has 6 divisors (see below), whose sum is σ = 2821196. Its totient is φ = 2333100.

The previous prime is 2566519. The next prime is 2566549. The reversal of 2566531 is 1356652.

It is not a de Polignac number, because 2566531 - 2⁹ = 2566019 is a prime.

It is a super-2 number, since 2×2566531² = 13174162747922, 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 2566531.

It is not an unprimeable number, because it can be changed into a prime (2566561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10485 + ... + 10726.

2^2566531 is an apocalyptic number.

2566531 is a deficient number, since it is larger than the sum of its proper divisors (254665).

2566531 is a wasteful number, since it uses less digits than its factorization.

2566531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21233 (or 21222 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 2566531 is about 1602.0396374622. The cubic root of 2566531 is about 136.9143087478.

The spelling of 2566531 in words is "two million, five hundred sixty-six thousand, five hundred thirty-one".