2193221257 has 8 divisors (see below), whose sum is σ = 2211577632. Its totient is φ = 2174889600.

The previous prime is 2193221231. The next prime is 2193221273. The reversal of 2193221257 is 7521223912.

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

It is a cyclic number.

It is not a de Polignac number, because 2193221257 - 2¹¹ = 2193219209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2193221057) 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, 200473 + ... + 211129.

It is an arithmetic number, because the mean of its divisors is an integer number (276447204).

Almost surely, 2^2193221257 is an apocalyptic number.

It is an amenable number.

2193221257 is a deficient number, since it is larger than the sum of its proper divisors (18356375).

2193221257 is a wasteful number, since it uses less digits than its factorization.

2193221257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12359.

The product of its digits is 15120, while the sum is 34.

The square root of 2193221257 is about 46831.8402051425. The cubic root of 2193221257 is about 1299.2542580875.

The spelling of 2193221257 in words is "two billion, one hundred ninety-three million, two hundred twenty-one thousand, two hundred fifty-seven".