2101630 has 16 divisors (see below), whose sum is σ = 3913920. Its totient is φ = 811552.

The previous prime is 2101621. The next prime is 2101651. The reversal of 2101630 is 361012.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2101630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3334 + ... + 3913.

It is an arithmetic number, because the mean of its divisors is an integer number (244620).

2^2101630 is an apocalyptic number.

2101630 is a deficient number, since it is larger than the sum of its proper divisors (1812290).

2101630 is a wasteful number, since it uses less digits than its factorization.

2101630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7283.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2101630 is about 1449.6999689591. The cubic root of 2101630 is about 128.0910403751.

Adding to 2101630 its reverse (361012), we get a palindrome (2462642).

The spelling of 2101630 in words is "two million, one hundred one thousand, six hundred thirty".