2861720051 has 2 divisors, whose sum is σ = 2861720052. Its totient is φ = 2861720050.

The previous prime is 2861720039. The next prime is 2861720063. The reversal of 2861720051 is 1500271682.

2861720051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2861720039) and next prime (2861720063).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2861720051 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2861725051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430860025 + 1430860026.

It is an arithmetic number, because the mean of its divisors is an integer number (1430860026).

Almost surely, 2^2861720051 is an apocalyptic number.

2861720051 is a deficient number, since it is larger than the sum of its proper divisors (1).

2861720051 is an equidigital number, since it uses as much as digits as its factorization.

2861720051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 2861720051 is about 53495.0469763323. The cubic root of 2861720051 is about 1419.7407532744.

The spelling of 2861720051 in words is "two billion, eight hundred sixty-one million, seven hundred twenty thousand, fifty-one".