211406801 has 2 divisors, whose sum is σ = 211406802. Its totient is φ = 211406800.

The previous prime is 211406761. The next prime is 211406809. The reversal of 211406801 is 108604112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184987201 + 26419600 = 13601^2 + 5140^2 .

It is a cyclic number.

It is not a de Polignac number, because 211406801 - 2⁶ = 211406737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211406809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105703400 + 105703401.

It is an arithmetic number, because the mean of its divisors is an integer number (105703401).

Almost surely, 2^211406801 is an apocalyptic number.

It is an amenable number.

211406801 is a deficient number, since it is larger than the sum of its proper divisors (1).

211406801 is an equidigital number, since it uses as much as digits as its factorization.

211406801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 211406801 is about 14539.8349715532. The cubic root of 211406801 is about 595.7165305506.

The spelling of 211406801 in words is "two hundred eleven million, four hundred six thousand, eight hundred one".