2221090 has 8 divisors (see below), whose sum is σ = 3997980. Its totient is φ = 888432.

The previous prime is 2221069. The next prime is 2221097. The reversal of 2221090 is 901222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2217121 + 3969 = 1489^2 + 63^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2221097) 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, 111045 + ... + 111064.

2^2221090 is an apocalyptic number.

2221090 is a deficient number, since it is larger than the sum of its proper divisors (1776890).

2221090 is a wasteful number, since it uses less digits than its factorization.

2221090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222116.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2221090 is about 1490.3321777376. The cubic root of 2221090 is about 130.4734217733.

It can be divided in two parts, 22 and 21090, that added together give a palindrome (21112).

The spelling of 2221090 in words is "two million, two hundred twenty-one thousand, ninety".