2241981997 has 4 divisors (see below), whose sum is σ = 2242157436. Its totient is φ = 2241806560.

The previous prime is 2241981979. The next prime is 2241982027. The reversal of 2241981997 is 7991891422.

2241981997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7991891422 = 2 ⋅3995945711.

It can be written as a sum of positive squares in 2 ways, for example, as 697963561 + 1544018436 = 26419^2 + 39294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2241981997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2241901997) 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, 66904 + ... + 94657.

It is an arithmetic number, because the mean of its divisors is an integer number (560539359).

Almost surely, 2^2241981997 is an apocalyptic number.

It is an amenable number.

2241981997 is a deficient number, since it is larger than the sum of its proper divisors (175439).

2241981997 is a wasteful number, since it uses less digits than its factorization.

2241981997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175438.

The product of its digits is 653184, while the sum is 52.

The square root of 2241981997 is about 47349.5723000747. The cubic root of 2241981997 is about 1308.8123176698.

The spelling of 2241981997 in words is "two billion, two hundred forty-one million, nine hundred eighty-one thousand, nine hundred ninety-seven".