2531564 has 24 divisors (see below), whose sum is σ = 5284608. Its totient is φ = 1037520.

The previous prime is 2531563. The next prime is 2531569. The reversal of 2531564 is 4651352.

It is not an unprimeable number, because it can be changed into a prime (2531563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1322 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (220192).

2^2531564 is an apocalyptic number.

It is an amenable number.

2531564 is an abundant number, since it is smaller than the sum of its proper divisors (2753044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2531564 is a wasteful number, since it uses less digits than its factorization.

2531564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965 (or 3963 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 2531564 is about 1591.0889352893. The cubic root of 2531564 is about 136.2896795466.

The spelling of 2531564 in words is "two million, five hundred thirty-one thousand, five hundred sixty-four".