2613631 has 4 divisors (see below), whose sum is σ = 2767392. Its totient is φ = 2459872.

The previous prime is 2613613. The next prime is 2613647. The reversal of 2613631 is 1363162.

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 2613631 - 2⁷ = 2613503 is a prime.

It is a super-2 number, since 2×2613631² = 13662134008322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2613601) 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, 76855 + ... + 76888.

It is an arithmetic number, because the mean of its divisors is an integer number (691848).

2^2613631 is an apocalyptic number.

2613631 is a deficient number, since it is larger than the sum of its proper divisors (153761).

2613631 is a wasteful number, since it uses less digits than its factorization.

2613631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153760.

The product of its digits is 648, while the sum is 22.

The square root of 2613631 is about 1616.6728178577. The cubic root of 2613631 is about 137.7467700820.

Adding to 2613631 its reverse (1363162), we get a palindrome (3976793).

The spelling of 2613631 in words is "two million, six hundred thirteen thousand, six hundred thirty-one".