2243651 has 4 divisors (see below), whose sum is σ = 2247192. Its totient is φ = 2240112.

The previous prime is 2243623. The next prime is 2243663. The reversal of 2243651 is 1563422.

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 2243651 - 2⁶ = 2243587 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2 + 2¹⁹ + 4⁴ + 3¹³ + 6⁶ + 5⁷ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2243621) 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, 530 + ... + 2183.

It is an arithmetic number, because the mean of its divisors is an integer number (561798).

2^2243651 is an apocalyptic number.

2243651 is a deficient number, since it is larger than the sum of its proper divisors (3541).

2243651 is an equidigital number, since it uses as much as digits as its factorization.

2243651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540.

The product of its digits is 1440, while the sum is 23.

The square root of 2243651 is about 1497.8821716010. The cubic root of 2243651 is about 130.9137011009.

The spelling of 2243651 in words is "two million, two hundred forty-three thousand, six hundred fifty-one".