2210639 has 4 divisors (see below), whose sum is σ = 2270424. Its totient is φ = 2150856.

The previous prime is 2210633. The next prime is 2210651. The reversal of 2210639 is 9360122.

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 2210639 - 2⁴ = 2210623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29837 + ... + 29910.

It is an arithmetic number, because the mean of its divisors is an integer number (567606).

2^2210639 is an apocalyptic number.

2210639 is a deficient number, since it is larger than the sum of its proper divisors (59785).

2210639 is an equidigital number, since it uses as much as digits as its factorization.

2210639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59784.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2210639 is about 1486.8217781563. The cubic root of 2210639 is about 130.2684590385.

The spelling of 2210639 in words is "two million, two hundred ten thousand, six hundred thirty-nine".