2157244 has 6 divisors (see below), whose sum is σ = 3775184. Its totient is φ = 1078620.

The previous prime is 2157229. The next prime is 2157247. The reversal of 2157244 is 4427512.

2157244 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269652 + ... + 269659.

2^2157244 is an apocalyptic number.

It is an amenable number.

2157244 is a deficient number, since it is larger than the sum of its proper divisors (1617940).

2157244 is a wasteful number, since it uses less digits than its factorization.

2157244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539315 (or 539313 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 2157244 is about 1468.7559361582. The cubic root of 2157244 is about 129.2110800212.

It can be divided in two parts, 2157 and 244, that added together give a 4-th power (2401 = 7⁴).

The spelling of 2157244 in words is "two million, one hundred fifty-seven thousand, two hundred forty-four".