2212690 has 16 divisors (see below), whose sum is σ = 3999960. Its totient is φ = 881280.

The previous prime is 2212673. The next prime is 2212699. The reversal of 2212690 is 962122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2053489 + 159201 = 1433^2 + 399^2 .

It is a super-2 number, since 2×2212690² = 9791994072200, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 2¹³ + 1 + 2¹⁹ + 6⁸ + 9² + 0 .

It is not an unprimeable number, because it can be changed into a prime (2212699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3820 + ... + 4360.

2^2212690 is an apocalyptic number.

2212690 is a deficient number, since it is larger than the sum of its proper divisors (1787270).

2212690 is a wasteful number, since it uses less digits than its factorization.

2212690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2212690 is about 1487.5113444946. The cubic root of 2212690 is about 130.3087336715.

Adding to 2212690 its product of nonzero digits (432), we get a palindrome (2213122).

The spelling of 2212690 in words is "two million, two hundred twelve thousand, six hundred ninety".