4211551811993 has 2 divisors, whose sum is σ = 4211551811994. Its totient is φ = 4211551811992.

The previous prime is 4211551811911. The next prime is 4211551812001. The reversal of 4211551811993 is 3991181551124.

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., 3901561206169 + 309990605824 = 1975237^2 + 556768^2 .

It is a cyclic number.

It is not a de Polignac number, because 4211551811993 - 2⁸ = 4211551811737 is a prime.

It is not a weakly prime, because it can be changed into another prime (4211551811693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2105775905996 + 2105775905997.

It is an arithmetic number, because the mean of its divisors is an integer number (2105775905997).

Almost surely, 2^{4211551811993} is an apocalyptic number.

It is an amenable number.

4211551811993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4211551811993 is an equidigital number, since it uses as much as digits as its factorization.

4211551811993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 50.

The spelling of 4211551811993 in words is "four trillion, two hundred eleven billion, five hundred fifty-one million, eight hundred eleven thousand, nine hundred ninety-three".