2256942993 has 8 divisors (see below), whose sum is σ = 3010543488. Its totient is φ = 1503985584.

The previous prime is 2256942953. The next prime is 2256943027. The reversal of 2256942993 is 3992496522.

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

It is not a de Polignac number, because 2256942993 - 2⁹ = 2256942481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2256942913) 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, 152521 + ... + 166662.

It is an arithmetic number, because the mean of its divisors is an integer number (376317936).

Almost surely, 2^2256942993 is an apocalyptic number.

It is an amenable number.

2256942993 is a deficient number, since it is larger than the sum of its proper divisors (753600495).

2256942993 is a wasteful number, since it uses less digits than its factorization.

2256942993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321543.

The product of its digits is 2099520, while the sum is 51.

The square root of 2256942993 is about 47507.2941031164. The cubic root of 2256942993 is about 1311.7171493370.

The spelling of 2256942993 in words is "two billion, two hundred fifty-six million, nine hundred forty-two thousand, nine hundred ninety-three".