2631563 has 4 divisors (see below), whose sum is σ = 2870808. Its totient is φ = 2392320.

The previous prime is 2631553. The next prime is 2631581. The reversal of 2631563 is 3651362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2631563 - 2¹⁰ = 2630539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119606 + ... + 119627.

It is an arithmetic number, because the mean of its divisors is an integer number (717702).

2^2631563 is an apocalyptic number.

2631563 is a deficient number, since it is larger than the sum of its proper divisors (239245).

2631563 is a wasteful number, since it uses less digits than its factorization.

2631563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239244.

The product of its digits is 3240, while the sum is 26.

The square root of 2631563 is about 1622.2092959911. The cubic root of 2631563 is about 138.0610770738.

The spelling of 2631563 in words is "two million, six hundred thirty-one thousand, five hundred sixty-three".