2211990 has 32 divisors (see below), whose sum is σ = 5792256. Its totient is φ = 536160.

The previous prime is 2211983. The next prime is 2211997. The reversal of 2211990 is 991122.

It is an interprime number because it is at equal distance from previous prime (2211983) and next prime (2211997).

It is a self number, because there is not a number n which added to its sum of digits gives 2211990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3022 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (181008).

2^2211990 is an apocalyptic number.

2211990 is an abundant number, since it is smaller than the sum of its proper divisors (3580266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2211990 is a wasteful number, since it uses less digits than its factorization.

2211990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6724.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 2211990 is about 1487.2760335593. The cubic root of 2211990 is about 130.2949908616.

It can be divided in two parts, 221 and 1990, that added together give a triangular number (2211 = T₆₆).

The spelling of 2211990 in words is "two million, two hundred eleven thousand, nine hundred ninety".