2056321065 has 16 divisors (see below), whose sum is σ = 3379036608. Its totient is φ = 1067063616.

The previous prime is 2056321051. The next prime is 2056321087. The reversal of 2056321065 is 5601236502.

It is not a de Polignac number, because 2056321065 - 2¹¹ = 2056319017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851987 + ... + 1853096.

It is an arithmetic number, because the mean of its divisors is an integer number (211189788).

Almost surely, 2^2056321065 is an apocalyptic number.

It is an amenable number.

2056321065 is a deficient number, since it is larger than the sum of its proper divisors (1322715543).

2056321065 is a wasteful number, since it uses less digits than its factorization.

2056321065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705128.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2056321065 is about 45346.6764493276. The cubic root of 2056321065 is about 1271.6384220835.

Adding to 2056321065 its reverse (5601236502), we get a palindrome (7657557567).

The spelling of 2056321065 in words is "two billion, fifty-six million, three hundred twenty-one thousand, sixty-five".