211380401 has 2 divisors, whose sum is σ = 211380402. Its totient is φ = 211380400.

The previous prime is 211380361. The next prime is 211380427. The reversal of 211380401 is 104083112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137007025 + 74373376 = 11705^2 + 8624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211380401 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (211320401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105690200 + 105690201.

It is an arithmetic number, because the mean of its divisors is an integer number (105690201).

Almost surely, 2^211380401 is an apocalyptic number.

It is an amenable number.

211380401 is a deficient number, since it is larger than the sum of its proper divisors (1).

211380401 is an equidigital number, since it uses as much as digits as its factorization.

211380401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 211380401 is about 14538.9270924646. The cubic root of 211380401 is about 595.6917322769.

The spelling of 211380401 in words is "two hundred eleven million, three hundred eighty thousand, four hundred one".