2195631 has 12 divisors (see below), whose sum is σ = 3232008. Its totient is φ = 1435824.

The previous prime is 2195629. The next prime is 2195653. The reversal of 2195631 is 1365912.

2195631 is a `hidden beast` number, since 21 + 9 + 5 + 631 = 666.

It is not a de Polignac number, because 2195631 - 2¹ = 2195629 is a prime.

It is a super-2 number, since 2×2195631² = 9641590976322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2195595 and 2195604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1825 + ... + 2778.

It is an arithmetic number, because the mean of its divisors is an integer number (269334).

2^2195631 is an apocalyptic number.

2195631 is a deficient number, since it is larger than the sum of its proper divisors (1036377).

2195631 is a wasteful number, since it uses less digits than its factorization.

2195631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4659 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 2195631 is about 1481.7661758861. The cubic root of 2195631 is about 129.9729924172.

The spelling of 2195631 in words is "two million, one hundred ninety-five thousand, six hundred thirty-one".