2635631 has 4 divisors (see below), whose sum is σ = 2656512. Its totient is φ = 2614752.

The previous prime is 2635613. The next prime is 2635643. The reversal of 2635631 is 1365362.

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 2635631 - 2¹⁰ = 2634607 is a prime.

It is a super-2 number, since 2×2635631² = 13893101536322, 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 2635631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2635691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10250 + ... + 10503.

It is an arithmetic number, because the mean of its divisors is an integer number (664128).

2^2635631 is an apocalyptic number.

2635631 is a deficient number, since it is larger than the sum of its proper divisors (20881).

2635631 is a wasteful number, since it uses less digits than its factorization.

2635631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20880.

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

The square root of 2635631 is about 1623.4626574085. The cubic root of 2635631 is about 138.1321809907.

The spelling of 2635631 in words is "two million, six hundred thirty-five thousand, six hundred thirty-one".