2243649 has 16 divisors (see below), whose sum is σ = 3100032. Its totient is φ = 1442688.

The previous prime is 2243623. The next prime is 2243663. The reversal of 2243649 is 9463422.

It is not a de Polignac number, because 2243649 - 2⁵ = 2243617 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2243669) 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, 16309 + ... + 16445.

It is an arithmetic number, because the mean of its divisors is an integer number (193752).

2^2243649 is an apocalyptic number.

It is an amenable number.

2243649 is a deficient number, since it is larger than the sum of its proper divisors (856383).

2243649 is a wasteful number, since it uses less digits than its factorization.

2243649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296.

The product of its digits is 10368, while the sum is 30.

The square root of 2243649 is about 1497.8815039916. The cubic root of 2243649 is about 130.9136622018.

The spelling of 2243649 in words is "two million, two hundred forty-three thousand, six hundred forty-nine".