2051005181 has 2 divisors, whose sum is σ = 2051005182. Its totient is φ = 2051005180.

The previous prime is 2051005157. The next prime is 2051005199. The reversal of 2051005181 is 1815001502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1792760281 + 258244900 = 42341^2 + 16070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051005181 - 2²² = 2046810877 is a prime.

It is a super-2 number, since 2×2051005181² = 8413244504977685522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051005111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025502590 + 1025502591.

It is an arithmetic number, because the mean of its divisors is an integer number (1025502591).

Almost surely, 2^2051005181 is an apocalyptic number.

It is an amenable number.

2051005181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051005181 is an equidigital number, since it uses as much as digits as its factorization.

2051005181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 2051005181 is about 45288.0246974849. The cubic root of 2051005181 is about 1270.5416874141.

Adding to 2051005181 its reverse (1815001502), we get a palindrome (3866006683).

The spelling of 2051005181 in words is "two billion, fifty-one million, five thousand, one hundred eighty-one".