2163631 has 8 divisors (see below), whose sum is σ = 2249984. Its totient is φ = 2079000.

The previous prime is 2163613. The next prime is 2163653. The reversal of 2163631 is 1363612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2163631 - 2⁷ = 2163503 is a prime.

It is a super-2 number, since 2×2163631² = 9362598208322, 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 (2163671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2506 + ... + 3256.

It is an arithmetic number, because the mean of its divisors is an integer number (281248).

2^2163631 is an apocalyptic number.

2163631 is a deficient number, since it is larger than the sum of its proper divisors (86353).

2163631 is an equidigital number, since it uses as much as digits as its factorization.

2163631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861.

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

The square root of 2163631 is about 1470.9286182545. The cubic root of 2163631 is about 129.3384737450.

The spelling of 2163631 in words is "two million, one hundred sixty-three thousand, six hundred thirty-one".