2016631 has 4 divisors (see below), whose sum is σ = 2086200. Its totient is φ = 1947064.

The previous prime is 2016607. The next prime is 2016653. The reversal of 2016631 is 1366102.

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 2016631 - 2¹³ = 2008439 is a prime.

It is a super-2 number, since 2×2016631² = 8133601180322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2016599 and 2016608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016671) 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, 34741 + ... + 34798.

It is an arithmetic number, because the mean of its divisors is an integer number (521550).

2^2016631 is an apocalyptic number.

2016631 is a deficient number, since it is larger than the sum of its proper divisors (69569).

2016631 is an equidigital number, since it uses as much as digits as its factorization.

2016631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69568.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2016631 is about 1420.0813356988. The cubic root of 2016631 is about 126.3403705482.

The spelling of 2016631 in words is "two million, sixteen thousand, six hundred thirty-one".