2256919409 has 2 divisors, whose sum is σ = 2256919410. Its totient is φ = 2256919408.

The previous prime is 2256919397. The next prime is 2256919411. The reversal of 2256919409 is 9049196522.

It is a happy number.

2256919409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2256535009 + 384400 = 47503^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256919409 - 2⁴ = 2256919393 is a prime.

Together with 2256919411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2256919499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128459704 + 1128459705.

It is an arithmetic number, because the mean of its divisors is an integer number (1128459705).

Almost surely, 2^2256919409 is an apocalyptic number.

It is an amenable number.

2256919409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256919409 is an equidigital number, since it uses as much as digits as its factorization.

2256919409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 2256919409 is about 47507.0458879522. The cubic root of 2256919409 is about 1311.7125803772.

The spelling of 2256919409 in words is "two billion, two hundred fifty-six million, nine hundred nineteen thousand, four hundred nine".