2813631 has 4 divisors (see below), whose sum is σ = 3751512. Its totient is φ = 1875752.

The previous prime is 2813627. The next prime is 2813633. The reversal of 2813631 is 1363182.

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 2813631 - 2² = 2813627 is a prime.

It is a super-2 number, since 2×2813631² = 15833038808322, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

2813631 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2813633) 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, 468936 + ... + 468941.

It is an arithmetic number, because the mean of its divisors is an integer number (937878).

2^2813631 is an apocalyptic number.

2813631 is a deficient number, since it is larger than the sum of its proper divisors (937881).

2813631 is an equidigital number, since it uses as much as digits as its factorization.

2813631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937880.

The product of its digits is 864, while the sum is 24.

The square root of 2813631 is about 1677.3881482829. The cubic root of 2813631 is about 141.1743228942.

The spelling of 2813631 in words is "two million, eight hundred thirteen thousand, six hundred thirty-one".