2056015681 has 2 divisors, whose sum is σ = 2056015682. Its totient is φ = 2056015680.

The previous prime is 2056015627. The next prime is 2056015693. The reversal of 2056015681 is 1865106502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1882171456 + 173844225 = 43384^2 + 13185^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056015681 - 2²³ = 2047627073 is a prime.

It is a super-2 number, since 2×2056015681² = 8454400961035787522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2056015081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028007840 + 1028007841.

It is an arithmetic number, because the mean of its divisors is an integer number (1028007841).

Almost surely, 2^2056015681 is an apocalyptic number.

It is an amenable number.

2056015681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056015681 is an equidigital number, since it uses as much as digits as its factorization.

2056015681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 2056015681 is about 45343.3091095037. The cubic root of 2056015681 is about 1271.5754686760.

The spelling of 2056015681 in words is "two billion, fifty-six million, fifteen thousand, six hundred eighty-one".