2543631 has 8 divisors (see below), whose sum is σ = 3426864. Its totient is φ = 1678080.

The previous prime is 2543623. The next prime is 2543633. The reversal of 2543631 is 1363452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2543631 - 2³ = 2543623 is a prime.

It is a super-2 number, since 2×2543631² = 12940117328322, which contains 22 as substring.

2543631 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543633) 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, 4080 + ... + 4661.

It is an arithmetic number, because the mean of its divisors is an integer number (428358).

2^2543631 is an apocalyptic number.

2543631 is a deficient number, since it is larger than the sum of its proper divisors (883233).

2543631 is an equidigital number, since it uses as much as digits as its factorization.

2543631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841.

The product of its digits is 2160, while the sum is 24.

The square root of 2543631 is about 1594.8764842457. The cubic root of 2543631 is about 136.5058833622.

The spelling of 2543631 in words is "two million, five hundred forty-three thousand, six hundred thirty-one".