2114205781 has 2 divisors, whose sum is σ = 2114205782. Its totient is φ = 2114205780.

The previous prime is 2114205761. The next prime is 2114205809. The reversal of 2114205781 is 1875024112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1786414756 + 327791025 = 42266^2 + 18105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2114205781 - 2⁵ = 2114205749 is a prime.

It is a super-2 number, since 2×2114205781² = 8939732168827639922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2114205761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057102890 + 1057102891.

It is an arithmetic number, because the mean of its divisors is an integer number (1057102891).

Almost surely, 2^2114205781 is an apocalyptic number.

It is an amenable number.

2114205781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2114205781 is an equidigital number, since it uses as much as digits as its factorization.

2114205781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2114205781 is about 45980.4934836502. The cubic root of 2114205781 is about 1283.4602380979.

Adding to 2114205781 its reverse (1875024112), we get a palindrome (3989229893).

The spelling of 2114205781 in words is "two billion, one hundred fourteen million, two hundred five thousand, seven hundred eighty-one".