2141858861 has 2 divisors, whose sum is σ = 2141858862. Its totient is φ = 2141858860.

The previous prime is 2141858833. The next prime is 2141858903. The reversal of 2141858861 is 1688581412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1911001225 + 230857636 = 43715^2 + 15194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2141858861 - 2²⁶ = 2074749997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2141858801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070929430 + 1070929431.

It is an arithmetic number, because the mean of its divisors is an integer number (1070929431).

Almost surely, 2^2141858861 is an apocalyptic number.

It is an amenable number.

2141858861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2141858861 is an equidigital number, since it uses as much as digits as its factorization.

2141858861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 44.

The square root of 2141858861 is about 46280.2210560840. The cubic root of 2141858861 is about 1289.0317556625.

The spelling of 2141858861 in words is "two billion, one hundred forty-one million, eight hundred fifty-eight thousand, eight hundred sixty-one".