2056422391 has 8 divisors (see below), whose sum is σ = 2182311504. Its totient is φ = 1931080320.

The previous prime is 2056422353. The next prime is 2056422463. The reversal of 2056422391 is 1932246502.

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

It is not a de Polignac number, because 2056422391 - 2²⁷ = 1922204663 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 (2056422791) 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, 129000 + ... + 144061.

It is an arithmetic number, because the mean of its divisors is an integer number (272788938).

Almost surely, 2^2056422391 is an apocalyptic number.

2056422391 is a deficient number, since it is larger than the sum of its proper divisors (125889113).

2056422391 is a wasteful number, since it uses less digits than its factorization.

2056422391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273521.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2056422391 is about 45347.7936729010. The cubic root of 2056422391 is about 1271.6593085622.

Adding to 2056422391 its reverse (1932246502), we get a palindrome (3988668893).

The spelling of 2056422391 in words is "two billion, fifty-six million, four hundred twenty-two thousand, three hundred ninety-one".