2631643 has 12 divisors (see below), whose sum is σ = 3135000. Its totient is φ = 2201472.

The previous prime is 2631631. The next prime is 2631647. The reversal of 2631643 is 3461362.

It is not a de Polignac number, because 2631643 - 2¹³ = 2623451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1483 + ... + 2731.

It is an arithmetic number, because the mean of its divisors is an integer number (261250).

2^2631643 is an apocalyptic number.

2631643 is a deficient number, since it is larger than the sum of its proper divisors (503357).

2631643 is a wasteful number, since it uses less digits than its factorization.

2631643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306 (or 1299 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

The square root of 2631643 is about 1622.2339535344. The cubic root of 2631643 is about 138.0624760871.

The spelling of 2631643 in words is "two million, six hundred thirty-one thousand, six hundred forty-three".